1. Genetic causes
2. Allergic reactions
4. Viral afflictions
5. Unknown factors
Is it harmful?
It is not harmful. It is more of a cosmetic problem. It is also not contagious. It has several variation such as hypertrophic lesions. pigmented lesions and mucous membrane lesions.
1. Healthy lifestyle
2. Drink plenty of water and juices
3. Topical steroid applications
4. Systemic steroid in case of severe symptoms
Dr Praveen Choudhary