A sebaceous cyst is a lump under the skin that can grow anywhere, most often on the face, back, neck and scalp.
It can contain fluid, oil, fat, keratin, or pus if it becomes infected.
Why it needs proper removal
A sebaceous cyst has to be removed together with the sac around it. If only the contents are squeezed out, it grows back. The procedure can be done at the clinic under local anaesthetic.
Information on this site is general guidance and not a substitute for seeing a doctor.