What skin disease is caused by a virus?

Herpes zoster, commonly known as shingles, is indeed caused by a virus. It specifically results from the reactivation of the varicella-zoster virus, which is the same virus responsible for chickenpox. After an individual has had chickenpox, the virus remains dormant in the nervous system and can later reactivate, leading to the painful rash and other symptoms associated with shingles.

Understanding this condition is essential, as it emphasizes the viral nature of herpes zoster, distinguishing it from other skin diseases. For instance, impetigo is a bacterial infection characterized by red sores on the face, often around the nose and mouth. Psoriasis is an autoimmune condition that leads to rapid skin cell production, resulting in scaling and inflammation, rather than a viral infection. Tinea capitis, also known as scalp ringworm, is a fungal infection affecting the scalp and is not caused by a virus. Recognizing the differences between these conditions helps in understanding their causes, treatment, and prevention.