What is it?
Infection of hair follicles caused by the bacteria staphylococcus. Bacterial invasion can occur spontaneously or favored by excess moisture or sweat, hair shaving or waxing.
Reaches children and adults and can emerge at any location where there are hairs. It is more frequent in the area of the beard (men) and groin (women).
Characteristics and symptoms
When superficial, folliculitis is characterized by the formation of small pustules ("pus bubbles") centered by a hair with a slight redness around. Some cases have no pus, only redness appearing around the hair. When the lesions are deeper, they form high and reddish lesions that may have a yellow pustule in the center. There may be pain and itching at the affected site.
Some types of folliculitis has specific characteristics:
- Folliculitis decalvans: in this case the infectious process leads to atrophy of the hair, leaving bald patches that extend due to peripheral progression of the disease.
- Folliculitis barbae (sycosis barbae): located in the beard area, reaches male adults. It has chronic feature and the proximity of the lesions can form red inflammatory plaques, with numerous pustules and crusts.
- Keloid folliculitis of the neck: common in men from African ascent, it forms grouped lesions that evolve to hardened scars and keloids on the occipital region.
- Periporitis suppurativa: reaches young children and usually follows the miliaria, with inflammatory nodules or superficial pustules that eventually drain pus.
Treatment is done with local or systemic antibiotics and antiseptic care. It is also important to prevent risk factors such as shaving and waxing. Some lesions may require surgical drainage.