Interdigital cysts are firm, raised subcutaneous inflammatory lesions found in and on the interdigital webs of the paw. The cause is usually a traumatically ruptured hair follicle. The surrounding ...

They can vary in size from small to larger masses. Some cysts, such as pilar cysts, originate from hair follicles and tend to ...

and dirt clog a hair follicle, creating a sinus tract (a small tunnel in the skin) that can become infected and turn into a cyst or swollen lump of tissue. Many people find a pilonidal sinus ...