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 in combating gram-negative folliculitis.


Pyoderma Faciale:

In the previous post we described about a type of acne which is know as acne conglobata which is the most severe form of acne vulgaris and is more common in males. Today we define about Pyoderma Faciale

Pyoderma Faciale


This type of severe facial acne affects only females, usually between the ages of 20 to 40 years old, and is characterized by painful large nodules, pustules and sores which may leave scarring. It begins abruptly, and may occur on the skin of a woman who has never had acne before. It is confined to the face, and usually does not last longer than one year, but can wreak havoc in a very short time.

Acne Conglobata:

This is the most severe form of acne vulgaris and is more common in males. It is characterized by numerous large lesions, which are sometimes interconnected, along with widespread blackheads. It can cause severe, irrevocable damage to the skin, and disfiguring scarring. It is found on the face, chest, back, buttocks, upper arms, and thighs.


The age of onset for acne conglobata is usually between 18 and 30 years, and the condition can stay active for many years. As with all forms of acne, the cause of acne conglobata is unknown. Treatment usually includes isotretinoin Accutane, and although acne conglobata is sometimes resistant to treatment, it can often be controlled through aggressive treatment over time.

Acne Rosacea

Acne Rosacea can look similar to the aforementioned acne vulgaris, and the two types of acne are sometimes confused for one another.


Rosacea affects millions of people, most of whom those who are over the age of 30. It appears as a red rash which is normally confined to the cheeks, nose, forehead and chin. The redness is often accompanied by bumps, pimples, and skin blemishes. Blood vessels may also become more visible on the skin. Blackheads are not a part of rosacea. It is more prevalent in women, but often more severe when found in men. Left untreated, it can cause swelling of the nose and the growth of excess tissue, a condition called rhinophyma. Treatment is often different for rosacea than for acne, and it is important that you consult a doctor can determine if what you are experiencing is acne vulgaris or rosacea.

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. Like other forms, it is caused by an excess buildup of sebum in the pores and, contrary to popular belief, is not caused by, nor is it affected by, hygiene or the lack thereof. A common treatment for cystic acne is isotretinoin, which cures most acne in about 90% of patients.
Cystic acne can affect the face, chest, back, shoulders and, occasionally, upper arms. Like pimples, which are more common, cysts are usually filled with a white pus-like substance. They are usually several millimeters in diameter, and can be quite painful.


If cystic acne is not treated early on, especially with antibiotics along with a topical cream, some degree of scarring will occur.


This can be quite severe depending on the case. Although many scars can be treated, scars on the body often do not respond as well as those on the face. In most cases, it is unlikely that all scars can be removed.