Skin pigmentation
After the lichen planus rash has cleared up, a change in skin colour may occur (a brown or grey mark), which can sometimes last for months. This is known as post-inflammatory hyperpigmentation, and tends to be more noticeable in people with darker skin.
Erosive lichen planus
Erosive lichen planus is a long-lasting (chronic) form of lichen planus that causes painful ulcers to develop and burning and discomfort in the male and female genital areas.
Occasionally, in around 2% of cases, long-term cases of erosive lichen planus can develop into certain types of cancer, for example:
Regularly examining yourself and being aware of any changes that occur will help you to identify any problems at an early stage. Pay close attention to ulcerated areas in your mouth or genitals that do not heal and persist for a long time. Visit your GP immediately if you notice any changes that you are concerned about.
You should also visit your dentist regularly to ensure that your teeth and gums remain healthy and that any ulcers or patches that form in your mouth are examined and treated promptly. Depending on individual circumstances, for adults, the recommended time for having dental check-ups is between three and 24 months.
Self-help
Below is some general self-help advice that you can follow to help ease your symptoms and prevent them getting worse.
Lichen planus of the skin
- avoid washing with soap or bubble bath, use plain warm water instead
- do not let affected areas of skin come into contact with shampoo by washing your hair over a basin
- use an emollient to moisturise your skin
Lichen planus of the mouth (oral lichen planus)
- avoid eating spicy foods and anything acidic, such as fruit juice, as they can irritate oral lichen planus
- avoid eating sharp food, such as crusty bread
- avoid drinking alcohol, particularly spirits
- if areas of your mouth are painful, stick to soft, bland foods, such as mashed potatoes and porridge
- if possible, continue to use your usual toothpaste
- avoid using mouthwashes that contain alcohol because they may be too strong, and keep your mouth as clean as possible
- visit your dentist regularly to help keep your gums and teeth healthy
Lichen planus of the genitals
- avoid washing with soap or bubble bath - use plain warm water or a soap substitute instead, such as aqueous cream
- use an emollient, such as petroleum jelly, before and after urinating
- applying ice packs to the affected areas may soothe itching and swelling (never apply an ice pack directly to your skin - wrap it in a clean tea towel before placing it on your body)
- women should wear stockings instead of tights
