Folliculitis
Folliculitis is a condition that causes inflammation of hair follicles and results in the appearance of acne around the existing follicles. Treatment involves topical antibiotics. If folliculitis worsens, it can destroy the hair follicles; thus, it's treatment should commence as soon as possible.
Ringworm
Ringworm is a fungal infection, such that when in contact with hair follicles, it can cause balding in regions of the scalp. There is usually a ring-like patch, where the outside is red and, the inside appears the normal skin tone. This condition can also be treated and is best to do so during the early stages.
Piedra
Piedra is a fungal infection that attaches itself to the hair, causing it to become brittle, break and eventually fall. The quickest way towards treatment is to shave the affected hair, though topical medications are also available.
Seborrheic dermatitis
A skin condition that can afflict any area of the body, such that the affected areas may become itchy and scaly; which can result in hair loss if present on the scalp.
Itching and dryness caused by this condition may impede the affected follicles from growing hair, deterring the growth cycle once hair begins to shed. Though a definite cure is not yet found some topical medications and shampoos help bring the condition under control.
Scalp psoriasis
Induces the scalp to become flaky and itchy, which can trigger scratching and result in bleeding/ scarring. Hair follicles in this area will not survive through scar tissue, resulting in hair loss. Psoriasis can also affect the entire body but can be regulated using topical treatments and shampoos (which can be provided by a GP).
