Overview

Lichen planus is a condition that mainly affects the skin and the inside of the mouth. It causes shiny reddish-purple bumps on the skin or grey-white spots in the mouth. The bumps may cause pain or itching. You can have it on your scalp, nails, and genitals. It can also occur on the underside of the wrist, your lower back, and your legs.

It's not contagious. Although its cause is not known, it may be linked to problems with the immune system. Lichen planus on the skin often goes away on its own. Other forms may not go away without treatment. Lichen planus in the mouth can increase the risk of oral cancer.

Treatment on the skin can relieve itching. Creams are most often used. If you have a severe case, you may take prescription medicines by mouth.

How can you care for yourself at home?

If it's on your skin

• Try not to scratch. Scratching can make it worse.
• Put cold, wet cloths on the area to reduce itching.
• Ask your doctor if you can take an antihistamine that might reduce itching and make you sleepy, such as diphenhydramine (Benadryl). Be safe with medicines. Read and follow all instructions on the label.
• Wash the affected area with water only. Soap can make itching and dryness worse. Pat dry.

If you have it in your mouth

• Brush your teeth twice each day, and floss once a day.
• Have your teeth cleaned regularly.
• Avoid foods that irritate your mouth.
• Stop smoking, stop using smokeless tobacco, and avoid alcohol.

If you have it on your genitals

• Apply medicine as directed by your doctor.
• If it's on your vulva:
  • Do not douche unless your doctor tells you to.
  • Avoid hot baths. Don't use soaps or bath products when you wash. Rinse with water only. And gently pat the area dry before you apply a thin layer of petroleum jelly.
• If it's on your penis:
  • Keep your penis clean. If you haven't been circumcised, gently pull the foreskin back to wash your penis with warm water. Make sure your penis is dry before you get dressed.