Those who have a habit of biting their lips may find that a small bluish bump has developed inside their mouth. It might disappear on its own or it might linger. Dr. Zaineb Hassan Makhzoumi, an ...

Mucous cysts are pseudocysts (cystic structures lacking a true lining) that usually appear on the middle or index finger of the dominant hand; toe involvement is uncommon. Although most mucous cysts ...