Cysts
Cysts are harmless, sac-like growtsh in the deeper layers of the skin. They form from the lining of a hair follicle that gets blocked. It is not known why cysts appear, nor why some persons get many of them.
Types of cyst include:
- Acne comedones (whiteheads)
- Acne cysts (large uninflamed acne lumps)
- Dermoid cyst (a developmental inclusion cyst)
- Milia (tiny surface white balls often found on the cheeks after sun exposure or following an injury). Milia can easily be squeezed out.
- Epidermal cysts (soft cheese-like contents)
- Trichilemmal cysts (scalp cysts, often multiple and familial, arising from hair root sheath)
- Pilar cysts (firm white content)
- Steatocystoma multiplex (multiple inherited cysts on trunk)
