What Is a Draining Sinus?
A Draining Sinus Is a Large, Red, Painful Lesion That Develops from the Merging of Multiple Acne Cysts The Essential Info Draining sinuses are huge, tender bumps that form when multiple cysts combine under the skin. They are the largest type of a lesion found in “nodulocystic” acne, often referred to simply as “cystic acne,” and are very …
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