Gram-Negative Folliculitis:

Gram-Negative Folliculitis:
This condition is a bacterial infection characterized by pustules and cysts, possibly occurring as a complication resulting from a long term antibiotic treatment of acne vulgaris.

It is a rare condition, and we do not know if it is more common in males or females at this time. Fortunately, isotretinoin (Accutane) is often effective [...]

Nodulocystic acne

Nodulocystic acne is also known as Cystic acne, it is a severe form of acne wherein acne develops into small cysts. Acne cysts are not true cysts in the sense that they are not abnormal dilations of skin structure, but rather nodules of inflammation. Although not uncommon, it is rarer than other types of acne. [...]