Medically reviewed by Susan Bard, MD Key Takeaways Some red spots on the skin can be harmless, while others may require medical attention. Conditions like heat rash, cherry angiomas, lichen planus, ...

Lichen nitidus is a rare skin condition that causes clusters of bumps on the skin. The bumps appear spontaneously, without an obvious cause. It is not contagious. ‌ The clusters of bumps can show up ...

Lichen nitidus is an inflammatory condition that causes small, shiny bumps to develop on the skin. It rarely causes other symptoms and does not usually require treatment. The causes of lichen nitidus ...