Does anything come out when a cyst ruptures?
Your body will absorb whatever bursts out of the cyst. That varies by the type of cyst it is, but can be blood, mucus or other fluid. Dermoid cysts can have all kinds of surprising stuff in them, including hair, skin and teeth. Absorbing the fluid from normal, physiologic cysts happens pretty quickly — within 24 hours.
What do I do if a cyst pops?
When a sebaceous cyst ruptures under the skin, it’s not usually infected. In most cases, it needs to be drained by a doctor who can lance the cyst. Some physicians prescribe antibiotics to settle the red, painful area of inflammation.