Lichen Planus of the Genitals: Symptoms, Causes, and Treatment in the UK

Lichen planus is an inflammatory condition that can affect the skin, hair, nails, and mucous membranes. When it involves the genital area, it is known as genital lichen planus. In the UK, this condition is relatively common, though it is often under-reported due to the sensitive nature of the symptoms.

Crucially, lichen planus is not an infection. You cannot catch it from someone else, and you cannot pass it on through sexual contact. It is thought to be an autoimmune-related response, where the body’s immune system mistakenly attacks the cells of the skin or mucous membranes. While it can be distressing, it is manageable with the right medical guidance and treatment plan aligned with NHS and NICE standards.

The appearance of lichen planus can vary depending on whether it affects the skin of the penis or the more delicate tissues of the vulva and vagina. Common symptoms reported by British patients include:

• Purplish bumps: Small, flat-topped, shiny bumps that often have a purple or reddish hue.
• Wickham’s Striae: Fine, lacy white lines on the surface of the affected skin.
• Intense itching: Pruritus (itching) is often the most bothersome symptom, particularly at night.
• Soreness and Erosions: In 'erosive' lichen planus, the skin can break down, leading to painful red sores or ulcers.
• Discomfort during sex: Inflammation can make sexual intercourse painful (dyspareunia) or lead to bleeding after sex.
• Urinary stinging: If the inflammation is near the urethral opening, passing urine may cause a stinging sensation.

The exact cause of lichen planus remains unknown, but medical consensus suggests it is an immune-mediated condition. T-cells (a type of white blood cell) attack a specific protein in the skin, though the trigger for this attack is often unidentified. Some factors that may play a role or trigger a flare-up include:

• Stress: High levels of emotional stress are frequently cited by patients before a flare.
• Medication: Certain medicines for high blood pressure or heart disease can occasionally trigger a lichenoid reaction.
• Genetic predisposition: It sometimes runs in families, suggesting a hereditary link.
• Co-existing conditions: It is occasionally associated with other autoimmune diseases, such as thyroid disorders or vitiligo.

Following NICE (National Institute for Health and Care Excellence) pathways, the primary goal of treatment is to control the inflammation and provide symptomatic relief. There is currently no permanent cure, but many patients experience long periods of remission.

Topical Steroids

The first-line treatment is usually a potent or ultra-potent topical steroid cream or ointment. These are applied directly to the affected area to calm the immune response and reduce itching and redness. A GP will typically provide a specific schedule, such as once daily for a few weeks, before tapering the dose.

Emollients

Using soap substitutes and moisturising emollients is vital. Standard soaps and shower gels can be highly irritant to inflamed genital skin. British GPs often recommend brands like Hydromol or Epaderm to maintain the skin barrier.

Immunomodulators

If steroids are not effective, a specialist may prescribe calcineurin inhibitors (like tacrolimus ointment). These work differently to steroids and can be used for longer periods under clinical supervision.

Managing lichen planus involves lifestyle adjustments to prevent further irritation. We recommend the following evidence-based tips:

• Wear loose clothing: Opt for cotton underwear and avoid tight-fitting trousers or leggings that cause friction.
• Wash with water only: Avoid wet wipes, perfumes, and feminine hygiene deodorants in the genital area.
• Use lubrication: Water-based or silicone-based lubricants can help reduce friction during sexual activity if the skin is not currently eroded.
• Stress management: Since stress can trigger flares, mindfulness and relaxation techniques may be beneficial.

If you notice new lumps, bumps, or persistent itching in the genital area, it is important to seek a professional medical opinion. You may wish to speak to a GP online for a confidential assessment if you are embarrassed or unable to visit a local surgery in person.

An online doctor can review your symptoms, look at photos provided through a secure portal, and determine if the presentation matches lichen planus or if further testing for STIs is required. If a diagnosis is clear, they can issue a private prescription for the necessary steroid treatments or provide a referral to a dermatologist or genitourinary medicine (GUM) clinic for a biopsy if the diagnosis is uncertain.