Epidermal cysts are caused by:

> Buildup of keratin (protein that occurs naturally in skin cells)
> Damage to the hair follicle from acne
> Blockage or improper functioning of oil glands

>Small, hard lumps develop under the skin.
>Lumps are filled with thick and smelly matter.
>Lumps turn red if infected. Pressure creates pain and discomfort.

However, these symptoms may also be caused by conditions other than epidermal cysts. Please seek medical attention for accurate diagnosis.