I have a cebasious cysist?

Yes get them removed: Sebaceous cysts will cause frequent infection , emits foul smell , removal is a simple procedure , also will have cosmetic benefit

Drain and excise: Best plan is to have your doctor drain the cyst with a tiny cut. If it isn't close to surface of the skin, you may need to use warm compresses for a few weeks. After draining, the cyst may appear gone, it isn't. The cyst lining remains and still needs removal but after draining the scar will be much smaller.

Infected?: Abx will NOT cure a sebaceous cyst. They can help clear the infection and surrounding cellulitis that can occur when the cyst becomes infected. .... but not the cyst itself. The cyst needs to be removed if bothering you. If not bothering you can be safely watched.