Boils are painful, pus-filled, and are caused by infections like Staphylococcus aureus. Cysts are painless, non-infectious growths filled with keratin or other substances. Antibiotics may treat boils ...

DEAR DR. ROACH: I had a ganglion cyst removed in 2018. I had no pain before it was removed, nor since — until now. I can see a very small lump forming, and it seems to be hitting a nerve. There is ...

Polycystic kidney disease (PKD) is a debilitating hereditary condition in which fluid-filled sacs form and proliferate in the ...

Colino is a contributor for TIME. Colino is a contributor for TIME. Ovarian cysts, which are small fluid-filled sacs that develop in or on the ovaries, are very common and are usually harmless. In ...