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Sebaceous Cyst on the Scrotum: A Comprehensive Guide

Discovering a lump on your scrotum can be unsettling. Many men feel embarrassed or anxious about this issue, often delaying medical consultation. If you’ve noticed a small, painless bump on your scrotal skin, you may be dealing with a sebaceous cyst—a common and generally harmless condition.

Sebaceous cysts on the scrotum are benign growths that develop beneath the skin’s surface. While they rarely pose serious health risks, understanding this condition helps you make informed decisions about your health. This guide provides comprehensive information about scrotal sebaceous cysts, including their causes, symptoms, and treatment options available in Singapore.

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Dr. Nor Azhari Bin Mohd Zam

MBBS (NUS)|MRCS (Edin.)|MMed Surgery (NUS)|FAMS (Urology)

Sebaceous cyst (1) Sebaceous Cyst on the Scrotum: A Comprehensive Guide

What is a Sebaceous Cyst?

A sebaceous cyst is a benign, closed sac located just beneath the skin’s surface that forms when oil-producing glands or hair follicles become blocked, leading to the accumulation of sebum or keratin. Although often used interchangeably with epidermoid cysts, these growths are particularly common in the scrotal area due to its high density of sebaceous glands and follicles, appearing as round, movable lumps that can range from a few millimetres to several centimetres in size. These cysts are frequently identified in adult men of all ages and may present as either single or multiple growths that remain stable for years or gradually enlarge over time.

Types of Sebaceous Cysts

Epidermoid Cysts

Epidermoid cysts are the type commonly found on the scrotum. They originate from the epidermis (outer skin layer) and contain keratin. These cysts have a distinctive central punctum (small dark opening or dot on the skin’s surface) and contain thick, yellowish material with a characteristic odour.

Pilar Cysts

Also known as trichilemmal cysts, these develop from hair follicles. They contain keratin but have a different cell lining compared to epidermoid cysts. Pilar cysts are less common on the scrotum and more frequently appear on the scalp.

Steatocystoma

This type of cyst arises from sebaceous glands and contains true sebum (oily material). When multiple steatocystomas occur, the condition is called steatocystoma multiplex, which can sometimes affect the scrotal region.

Scrotal Calcinosis

While technically not sebaceous cysts, this related condition involves multiple calcified nodules (hardened lumps containing calcium deposits) on the scrotum. Some researchers believe these may represent calcified or ruptured epidermoid cysts.

Causes & Risk Factors

Common Causes

  • Blocked sebaceous glands: When oil-producing glands become obstructed, sebum accumulates and forms a cyst
  • Damaged hair follicles: Trauma or irritation to hair follicles can trigger cyst formation
  • Ruptured sebaceous glands: Injury to the scrotal skin can damage glands, leading to cyst development
  • Developmental abnormalities: Some cysts form when skin cells become trapped during embryonic development
  • Swollen hair follicles: Inflammation around hair follicles can contribute to cyst formation

Risk Factors

  • Age: Frequently seen in adults
  • Male gender: Scrotal sebaceous cysts affect only men
  • History of acne: Men with acne-prone skin may have higher susceptibility
  • Previous skin injuries: Cuts, surgical scars, or trauma to the scrotal area increase risk
  • Genetic factors: Some men may have inherited tendencies for cyst development
  • Hot and humid climate: Singapore’s tropical environment may contribute to increased sebaceous gland activity
  • Tight clothing: Prolonged wearing of restrictive underwear can cause friction and follicle irritation
  • Poor hygiene: Inadequate genital hygiene may contribute to blocked glands

Signs & Symptoms

Mild Symptoms
  • Small, round bump beneath the scrotal skin
  • Flesh-coloured or slightly yellowish appearance
  • Smooth, moveable lump that rolls under the fingers
  • Painless to touch
  • Visible central punctum (dark dot) in some cases
  • No interference with daily activities

Sebaceous cysts may remain in this mild stage for years without causing problems. Many men discover them incidentally during self-examination or bathing.

Moderate Symptoms
  • Gradual increase in cyst size over weeks or months
  • Mild tenderness when pressure is applied
  • Slight redness around the cyst
  • Occasional discomfort during physical activities
  • Visible cosmetic concern due to size
  • Multiple cysts developing in the same area

At this stage, the cyst may begin affecting your comfort, particularly during exercise, cycling, or intimate activities.

Severe Symptoms
  • Significant pain and tenderness
  • Obvious redness, warmth, and swelling (signs of infection)
  • Discharge of foul-smelling, thick material
  • Fever or general malaise (feeling unwell) if infection spreads
  • Rapid increase in size
  • Difficulty walking or sitting comfortably
  • Abscess formation (a collection of pus that forms when
  • infection becomes severe)

Infected sebaceous cysts require prompt medical attention. The scrotal area’s warmth and moisture create an environment where infections can progress quickly.

Experiencing these symptoms?

Schedule a consultation with a urologist for an accurate diagnosis and individualised treatment plan.

When to See a Urologist

Consult a medical professional if you experience:

  • Rapid growth: A cyst that suddenly increases in size
  • Pain or tenderness: Any discomfort associated with the lump
  • Signs of infection: Redness, warmth, swelling, or discharge
  • Difficulty with activities: Interference with walking, sitting, or intimacy
  • Multiple cysts: Several lumps appearing on the scrotum
  • Uncertainty about the lump: Any scrotal mass should be evaluated to rule out other condition
  • Cosmetic concerns: If the cyst’s appearance causes distress

The first consultation typically involves a physical examination of the scrotal area. Your urologist can assess the cyst’s size, location, consistency, and any signs of infection. Sebaceous cysts can often be diagnosed through clinical examination alone.

Early evaluation is important because scrotal lumps require proper assessment to distinguish benign cysts from other conditions that may need different management approaches.

Diagnosis and Testing Methods

Physical Examination

The primary diagnostic method for scrotal sebaceous cysts is a thorough physical examination. Your urologist will palpate (feel) the lump to assess its characteristics. Sebaceous cysts typically feel smooth, round, and movable beneath the skin. These features distinguish them from other scrotal masses.

Transillumination

This simple test involves shining a bright light on the scrotum. Fluid-filled structures like hydroceles (fluid-filled sacs around the testicle) allow light to pass through. Solid masses and sebaceous cysts block light transmission. This helps differentiate cysts from other scrotal conditions.

Ultrasound Imaging

Scrotal ultrasound is a painless, non-invasive imaging technique that uses sound waves to create pictures of internal structures. It provides detailed pictures of scrotal structures and helps confirm the diagnosis by showing the cyst’s location, size, and relationship to surrounding tissues. It can also rule out testicular involvement and other concerning conditions.

Preparation is minimal—you simply lie down while the sonographer (the healthcare professional operating the ultrasound machine) applies gel and moves a probe over the scrotal area. Results are typically available immediately.

Histopathological Examination

If a surgeon removes the cyst, the tissue is sent for microscopic examination to study the cells and tissue structure. This confirms the diagnosis and ensures no unexpected findings. The pathology report usually takes several working days.

Treatment Options Overview

Treatment for scrotal sebaceous cysts depends on their size, symptoms, and whether complications like infection have developed. Your urologist will recommend treatment based on your specific risk factors, symptoms, and personal preferences.

Observation and Monitoring

Small, asymptomatic sebaceous cysts often require no immediate treatment. If the cyst causes no pain, shows no signs of infection, and doesn’t bother you cosmetically, your urologist may recommend a watch-and-wait approach. Regular monitoring ensures any changes are detected early. This conservative strategy is appropriate for many patients, as sebaceous cysts are benign and may remain stable for years.

Medications for Infected Cysts

When a sebaceous cyst becomes infected, antibiotic therapy may be necessary. Oral antibiotics (medications that fight bacterial infections) help combat bacterial infections and reduce inflammation. Your urologist will select appropriate antibiotics based on the likely causative organisms. Warm compresses applied to the affected area can provide symptomatic relief and encourage drainage. Pain relief medications may also be prescribed to manage discomfort during the acute phase.

Incision and Drainage

For infected cysts that have formed abscesses, incision and drainage provide rapid relief. This minor procedure involves numbing the area with local anaesthesia (medication that blocks pain in a specific area while you remain awake). The doctor makes a small cut to release the accumulated pus and infected material. The wound is then cleaned and may be packed with gauze to allow continued drainage. This procedure can address the acute infection, but doesn’t remove the cyst wall. Recurrence is common after incision and drainage alone. Definitive excision may be recommended once the infection resolves.

Surgical Excision

Complete surgical excision is the definitive treatment for sebaceous cysts on the scrotum. This procedure involves the doctor removing the entire cyst, including its capsule (wall), which may reduce recurrence risk. The urologist performs the procedure under local anaesthesia, makes an incision over the cyst, and carefully dissects it from surrounding tissues. The wound is closed with absorbable sutures (stitches that dissolve on their own over time). Recovery is generally straightforward. Many men return to normal activities within a few days. Strenuous exercise and sexual activity should typically be avoided for approximately two weeks.

Minimal Excision Technique

This refined surgical approach involves making a small puncture incision, expressing the cyst contents, and then extracting the cyst wall through the small opening. The minimal excision technique may result in a smaller scar and potentially faster healing compared to traditional excision. It may work well for uncomplicated cysts, but it may not be suitable for infected or previously ruptured cysts where the capsule has become adherent to surrounding tissues.

Laser Treatment

Carbon dioxide laser or other laser modalities can be used to remove sebaceous cysts. The laser vaporises the cyst and its contents while sealing blood vessels, potentially reducing bleeding and scarring. This option may be considered for multiple small cysts or when minimal scarring is a priority. The scrotal skin generally heals well following laser procedures due to its excellent blood supply.

Response to treatment varies based on individual health factors.

Dr Azhari can assess your specific situation and recommend an appropriate treatment approach tailored to your circumstances.

Complications if Left Untreated

While sebaceous cysts are benign, leaving them untreated can lead to several complications.

  • Infection and Abscess Formation

    A frequently seen complication is bacterial infection. The scrotal region’s warm, moist environment creates conditions for bacterial growth. An infected cyst becomes painful and swollen and may develop into an abscess (a collection of pus) requiring drainage. Infections can spread to surrounding tissues, causing cellulitis (a skin infection that causes redness and swelling). Rarely, infections can enter the bloodstream.

  • Rupture

    Cysts may rupture spontaneously or from trauma, releasing their contents into surrounding tissues. Rupture triggers an intense inflammatory reaction with pain, redness, and swelling. Ruptured cysts can be more challenging to remove surgically due to scarring and tissue inflammation.

  • Enlargement

    Untreated cysts may gradually enlarge over time, becoming more noticeable and potentially interfering with physical activities or intimate relationships.

  • Psychological Impact

    Visible lumps on the genitals can cause significant anxiety and embarrassment, affecting self-esteem and intimate relationships. Many men experience unnecessary worry about whether the growth could be cancerous. In fact, these cysts are benign.

  • Recurrence After Partial Treatment

    If infection is treated without complete cyst removal, the cyst may refill and recur. Multiple treatment episodes may be required.

Prevention

  • Maintain good hygiene: Regular, gentle cleansing of the genital area with mild, unscented soap helps prevent blocked glands and reduces bacterial colonisation. Ensure thorough drying after washing.
  • Wear breathable underwear: Cotton underwear allows better air circulation compared to synthetic fabrics. Loose-fitting underwear reduces friction and heat accumulation in the scrotal region.
  • Avoid trauma: Protect the genital area during sports and physical activities. Scrotal trauma can damage hair follicles and sebaceous glands, potentially triggering cyst formation.
  • Address skin conditions: If you have acne or other skin conditions affecting the genital area, seek appropriate treatment. Managing underlying skin issues may reduce cyst risk.
  • Regular self-examination: Familiarise yourself with normal scrotal anatomy through regular self-examination. This helps you detect new lumps early when they’re easier to manage.

Frequently Asked Questions

Are sebaceous cysts on the scrotum cancerous?

No, sebaceous cysts are benign (non-cancerous) growths. They do not transform into cancer and pose no risk of malignancy. That said, any new scrotal mass should be evaluated by a medical professional to confirm the diagnosis and rule out other conditions that may require different treatment.

Can I squeeze or pop a sebaceous cyst myself?

Attempting to squeeze or pop a sebaceous cyst at home is strongly discouraged. This can introduce bacteria, cause infection and abscess formation. Home manipulation also cannot remove the cyst wall, meaning the cyst may refill and recur. The scrotal skin is delicate, and improper handling can cause scarring or damage to underlying structures. Professional medical treatment is always recommended.

How long is the recovery after surgical removal?

Recovery from scrotal sebaceous cyst excision is typically straightforward. Many men experience mild discomfort for a few days, which is manageable with simple pain relief. You can usually return to desk work within a short period. Strenuous physical activity and sexual intercourse should typically be avoided for approximately two weeks to allow proper healing. Complete wound healing takes a few weeks. Your urologist will provide specific post-operative instructions.

Will the cyst come back after treatment?

Recurrence depends on the treatment method. Simple drainage without removing the cyst wall has higher recurrence rates—the cyst may refill over time. Complete surgical excision removes the entire cyst, including its capsule, which may reduce recurrence rates. Occasionally, new cysts may develop in different locations, particularly in men prone to multiple cysts.

Can sebaceous cysts affect fertility or sexual function?

Sebaceous cysts develop in the scrotal skin and do not involve the testicles or reproductive structures within the scrotum. They have no impact on sperm production, testosterone levels, or fertility. Cysts also typically don’t affect sexual function, though large or multiple cysts may occasionally cause cosmetic concerns or physical discomfort during intimacy.

Is scrotal sebaceous cyst treatment painful?

Treatment techniques prioritise patient comfort. Surgical excision is performed under local anaesthesia—you should not feel pain during the procedure, only pressure and movement sensations. Post-operative discomfort is typically mild and well-controlled with standard pain medications.

How can I tell if my scrotal cyst is infected?

Signs of infection include:

  • Increasing pain
  • Redness spreading beyond the cyst
  • Warmth to touch
  • Swelling
  • Discharge of pus or foul-smelling material

You may also experience fever or feel generally unwell. If you notice any of these symptoms, seek medical attention promptly. Infected cysts typically require antibiotic treatment and possibly drainage before definitive removal.

Can multiple cysts be removed in one procedure?

Yes, when multiple sebaceous cysts are present on the scrotum, they can usually be removed during a single surgical session. Your urologist will assess the number, size, and location of cysts to plan an appropriate approach. Removing multiple cysts at once means only one recovery period, which is generally more convenient than staged procedures.

Important Note: Individual experiences with sebaceous cysts vary based on personal health factors, cyst characteristics, and individual healing patterns. The information provided here is educational. Consult with qualified healthcare professionals who can assess your specific situation and provide individualised medical advice tailored to your circumstances.

Conclusion

Sebaceous cysts on the scrotum are common, benign growths that affect many men. While they’re generally harmless, understanding this condition helps you recognise when professional evaluation is needed. Scrotal sebaceous cysts can be managed with straightforward treatment approaches, particularly when addressed before complications develop.

If you’ve noticed a lump on your scrotum or have been living with a known cyst that’s causing concerns, professional evaluation provides clarity and peace of mind. Treatment options offer solutions with minimal discomfort and downtime. Speak with Dr Azhari about appropriate evaluation and treatment options tailored to your circumstances.

Take the First Step Towards Better Health

Living with a scrotal sebaceous cyst can be concerning, but you don’t have to face it alone. Dr Azhari provides clinical assessment and treatment for sebaceous cysts.

Dr. Nor Azhari Bin Mohd Zam

Dr. Nor Azhari Bin Mohd Zam

MBBS (NUS)|MRCS (Edin.)|MMed Surgery (NUS)|FAMS (Urology)

With more than 15 years experience as a certified Urologist, Dr Nor Azhari specializes in treating a wide range of kidney, bladder and prostate conditions as well as disorders of the male reproductive organs.

He offers minimally invasive treatment options and provides same-day appointments for convenience.

  • Skilled urologist and kidney stone surgeon.
  • Director of Endourology (Urinary stone service) at Singapore General Hospital – 2016 to 2023.
  • Recognized with the College of Surgeons Gold Medal and Singapore Urological Association Book prize.
  • Minimally invasive treatment options available (non-invasive and endoscopic/key-hole techniques).

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