Vulval Sebaceous Hyperplasia: Identifying Bumps and When to Seek a UK Diagnosis

Vulval sebaceous hyperplasia occurs when the sebaceous (oil-producing) glands in the vulval skin become enlarged. This results in the appearance of one or more small, soft bumps, usually on the labia majora or minora. While these spots can cause significant anxiety for patients who fear they have contracted a sexually transmitted infection, they are a completely benign (non-cancerous) dermatological condition.

In the United Kingdom, many women first notice these bumps during self-examination or after pregnancy, as hormonal changes can sometimes play a role in their development. According to NICE clinical pathways and NHS guidance, sebaceous hyperplasia is more common on the face but is a recognised variant in the genital region. These oil glands are a normal part of the skin’s anatomy; they simply become more prominent than usual.

The key to identifying vulval sebaceous hyperplasia is its specific appearance. Patients typically report small, raised papules (bumps) that are usually between 1mm and 5mm in diameter. Characteristics include:

• Colour: Usually flesh-coloured, yellowish, or slightly white.
• Shape: Often described as having a slight central indentation (umbilication), though this is more common on facial lesions.
• Texture: Soft to the touch and painless.
• Location: Most frequently found on the labia majora, but they can appear anywhere on the vulva where hair follicles and oil glands are present.

Unlike conditions such as vulval dermatitis or vaginal thrush, sebaceous hyperplasia does not cause itching, discharge, or soreness. If you are experiencing pain or an itch, the bumps may be a secondary symptom of a different condition that requires a separate assessment.

The exact cause of why certain glands enlarge while others do not is not fully understood, but several factors are believed to contribute to the condition in UK patients. The primary driver is often thought to be hormonal. Androgens (male-type hormones present in all women) stimulate the sebaceous glands; as we age or undergo hormonal shifts, these glands can over-react and increase in volume.

Other potential factors include:

• Age: It is most frequently seen in middle-aged or older women, although as an online GP service, we also see cases in younger women.
• Skin Type: Those with naturally oily skin may be more prone to sebaceous gland issues.
• Genetics: There may be a familial predisposition to developing enlarged oil glands.

It is crucial to remember that this condition is not contagious. You cannot pass vulval sebaceous hyperplasia to a partner through sexual contact, and it is not a sign of poor hygiene.

The most common reason for a patient to request an online GP consultation regarding vulval bumps is the concern that they have genital warts (caused by HPV). Differentiating between the two is vital for both peace of mind and appropriate management.

How they differ:

• Genital Warts: Usually have a 'cauliflower-like' or rough texture, can grow in clusters, and are highly contagious. They move through the population via skin-to-skin contact.
• Sebaceous Hyperplasia: These are smoother, softer, and usually solitary or scattered rather than appearing in tightly packed 'fringe' clusters. They remain stable in size for long periods.
• Fordyce Spots: These are also enlarged sebaceous glands but are typically much smaller (pinhead size) and do not have the same raised, 'bump' profile as hyperplasia.

If there is any doubt, a UK clinician will often recommend an STI screening or a visual assessment to rule out viral infections before confirming a diagnosis of sebaceous hyperplasia.

While vulval sebaceous hyperplasia is harmless, any new lump or bump in the genital area should be reviewed by a professional to ensure an accurate diagnosis. Many patients find the prospect of an in-person pelvic exam daunting and prefer to speak to a GP online as a first step.

An online doctor can review high-quality photographs or discuss your symptoms via video link. This is a discreet and efficient way to receive reassurance. You should book a consultation if:

• The bumps are changing rapidly in size or shape.
• The lesion begins to bleed or crust over.
• You are feeling anxious about your sexual health.
• The bumps are located in an area where they are frequently caught on clothing or irritated by shaving.

Our editorial team ensures that advice aligns with the latest British Association of Dermatologists guidelines, providing you with evidence-based care from the comfort of your home.

Because this is a benign condition, the NHS rarely offers treatment on the grounds of medical necessity. In most cases, the best management is to leave the bumps alone. However, if they cause significant distress or discomfort, private treatment options are available in the UK.

Potential treatments include:

• Cryotherapy: Freezing the lesion with liquid nitrogen to cause it to fall off.
• Electrocautery: Using a small electrical needle to heat and shrink the oil gland.
• Laser Therapy: Targeted light energy to reduce the size of the bump.
• Topical Retinoids: Occasionally prescribed to help regulate oil gland production, though effectiveness on the vulval skin can vary and may cause irritation.

Attempting to 'pop' or squeeze these bumps is strongly discouraged. Unlike a spot or pimple, there is no 'head' to the bump, and squeezing will only result in inflammation, scarring, or a secondary bacterial infection.