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 ...

After popping what she thought was an ordinary pimple, a woman discovered it was a cyst that would leave her with a permanent scar. Stephanie Warkotsch, 30, noticed the lump on her cheek at the ...