Lichen Planus

Lichen planus is a chronic recurrent inflammatory disorder of the skin and mucous membranes. Lichen planus is not contagious and is a poorly understood skin condition. Its name is descriptive in that to some it resembles a simple plant, lichen, which grows on rocks and tree bark, while planus is Latin for flat.

The cause of lichen planus is still not clear, but it is thought to be related to an over-reaction in the skin’s defence and immune system. Rashes that look like lichen planus, known as ‘lichenoid drug eruptions’, are sometimes triggered by taking medicines for raised blood pressure or anti-malarial tablets.

The symptoms of an oral lichen planus are

• White streaks appear on the inside of the cheeks, which are not usually painful or itchy.
• The gums tongue, and lips may also be affected.
• The white streaks do not go away. Possible redness and blistering of the gums.
• Sore mouth ulcers can develop and recur.
• The individual’s sense of taste may become blunted, and some people experience a metallic taste. Spicy foods, crispy foods, and tomato products can make symptoms worse.

After examining the skin and identifying the characteristic rash, a doctor or dentist may be able to diagnose lichen planus based on its appearance.

In some cases, a doctor may need to perform a punch biopsy

If the doctor is still unsure, the patient may be referred to a dermatologist, or skin specialist.

Lichen planus is not a curable condition. When it affects the skin, it usually clears by itself within several months. However, it can take up to 2 years. Treatment focuses on easing symptoms until the rash clears