A pilar cyst, sometimes called a trichilemmal cyst, forms when a hair follicle gets clogged. They can happen anywhere on your body but are most common on the scalp. Pilar cysts can be irritating but ...

‌Sebaceous hyperplasia is a harmless, common skin condition that becomes more common with age. It happens when your sebaceous oil glands make too much oil that gets trapped under your skin and causes ...