Vulval Lichen Simplex Chronicus: Breaking the Itch-Scratch Cycle

Lichen simplex chronicus (LSC) is a skin condition that develops as a result of chronic itching and subsequent scratching. When it affects the vulval area (the external parts of the female genitalia), it can become particularly distressing and uncomfortable. Unlike many other skin conditions, LSC is not the primary cause of the itch; rather, it is the skin's response to being rubbed or scratched over a long period. In the UK, it is a frequent diagnosis in women's health clinics and dermatology departments.

When you scratch the delicate skin of the vulva, the skin becomes inflamed. In an attempt to protect itself, the skin grows thicker and more leathery. This thickened skin is actually more sensitive to irritation, which triggers more itching. This is known as the 'itch-scratch cycle'. The primary goal of treatment is to break this cycle to allow the skin to heal and return to its normal texture.

The hallmark of vulval lichen simplex chronicus is an intense, often overwhelming itch that can be worse at night or during stressful periods. Patients often report scratching in their sleep, leading to broken skin and soreness upon waking. The common symptoms include:

• Thickened skin: The affected areas may feel leathery or 'bark-like'.
• Exaggerated skin lines: Known as lichenification, the natural lines of the skin become very prominent.
• Colour changes: The skin may appear darker (hyperpigmented) or paler (hypopigmented) than the surrounding area, and often looks red or dusky when inflamed.
• Excoriations: Visible scratch marks, crusting, or occasional bleeding.
• Soreness: While itching is the main symptom, the skin can become tender or painful if the surface is broken.

LSC usually affects the labia majora but can spread to the labia minora or the perineum. It is important to note that LSC is often asymmetrical, meaning it might be more severe on one side depending on your dominant hand and scratching habits.

According to NHS and NICE clinical knowledge summaries, several factors can initiate the initial itch that leads to LSC. These triggers can be physical, chemical, or psychological. Identification of these triggers is a key part of management.

Irritants and Allergens

Many women develop an initial irritation from ‘contact dermatitis.’ This can be caused by scented soaps, bubble baths, feminine hygiene wipes, or even some brands of toilet paper. Synthetic underwear and tight clothing can trap moisture and heat, exacerbating the sensation of itching.

Underlying Skin Conditions

Sometimes LSC develops on top of another condition, such as vulval thrush (candidiasis) or eczema. While the original infection may clear, the habit of scratching remains, leading to chronic LSC.

Stress and Anxiety

Psychological factors play a significant role. Many patients find that the urge to scratch intensifies when they are stressed, tired, or bored. Scratching can sometimes become a subconscious 'habitual' behaviour, particularly in the evening when there are fewer distractions.

Management of vulval lichen simplex chronicus requires a two-pronged approach: medical treatment to dampen the inflammation and lifestyle changes to protect the skin barrier. UK guidelines usually recommend the following:

Topical Steroids

The mainstay of treatment is a potent or super-potent topical steroid ointment (such as betamethasone or clobetasol). Unlike creams, ointments are generally preferred for the vulva as they contain fewer preservatives and provide a better protective barrier. These are usually applied once daily for a few weeks to settle the inflammation and thin the thickened skin back to normal.

Emollients and Soap Substitutes

You should stop using all soaps and shower gels on the vulval area. Instead, use a plain emollient (moisturiser) as a soap substitute. This cleanses the skin without stripping away natural oils. Applying emollients frequently throughout the day can also create a physical barrier that reduces the 'tingle' of an itch.

Breaking the Habit

Practical steps to stop scratching are vital. Keeping fingernails short, wearing cotton gloves to bed, and using cold compresses to soothe the skin can help. In some cases, a sedative antihistamine may be prescribed for short-term use at night to help you sleep through the itching.

If you are experiencing persistent vulval itching or have noticed the skin in that area becoming thick and rough, you should seek medical advice. You can speak to a GP online to discuss your symptoms in a calm, private environment. An online doctor can help by:

• Conducting a thorough assessment of your symptoms and medical history.
• Reviewing your current laundry and hygiene routine to identify potential irritants.
• Prescribing appropriate steroid ointments and soap substitutes according to NICE guidelines.
• Providing a private sick note if the condition is causing significant distress or sleep deprivation.
• Advising when a physical examination or referral to a dermatologist or vulval clinic is necessary.

Many women feel embarrassed about vulval issues, but these are medical conditions like any other skin problem. Early intervention prevents the skin from becoming severely thickened and helps you find relief faster.

To prevent a recurrence of LSC, the British Association of Dermatologists suggests the following 'vulval skin care' regime:

• Wash with water only: Or use a soap substitute. Avoid sponges or flannels; use your hands gently.
• Pat dry: Do not rub the skin with a towel. You can also use a hairdryer on a 'cool' setting to dry the area thoroughly.
• Wear loose clothing: Opt for 100% cotton underwear and avoid tight jeans or leggings that compress the vulva.
• Wash underwear carefully: Use a non-biological detergent and avoid fabric softeners, which are common irritants.
• Sleep without underwear: Allowing the area to 'breathe' at night can significantly reduce irritation.