Some of the infectious agents and infection-related conditions can cause to hair loss. I want to explain some common ones.
Surprisingly, ringworm has nothing to do with worms, but is a fungal infection that can found anywhere on the body. If it develops on the scalp, it can cause patches of hair loss and is known to doctors as “tinea capitis.” Ringworm is the same thing as athlete’s foot, and the same kind of fungal infection that can affect the nails too.
On the scalp, ringworm usually starts as a small pimple that progressively expands in size, leaving scaly patches of temporary baldness. The fungus gets into the hair follicles in the affected area and these hairs become brittle and break off easily, leaving a bald patch of skin. Affected areas are often itchy, red, and inflamed, with scaly patches that may bubble and ooze. The patches are usually redder around the outside with a more normal skin tone in the center. This may create the appearance of a ring — hence the name, ringworm.
Worldwide, the fungus Microsporum audouinii is a very common cause of ringworm, but increasingly Trichophyton tonsurans can also cause tinea capitis, especially in the US and Latin American countries. Other fungi that may cause tinea capitis include Trichophyton schoenleinii andTrichophyton megninii in Southern Europe and Africa, and Trichophyton violaceum in the Middle East.
The fungus Microsporum gypseum can also sometimes cause tinea capitis. This fungus is common in soil and may be transferred to humans by contact with infected animals. You can also get ringworm from pets that carry the fungus, and cats in particular are common carriers. Ringworm is contagious. It can be passed from one person to the next by direct skin-to-skin contact. You can also catch ringworm through contact with contaminated items such as combs, unwashed clothing, and shower or pool surfaces.
Treatment for ringworm varies depending on the particular fungus involved. Some types of ringworm infection will go away spontaneously and no treatment is given. You should choose some natural treatment.
Folliculitis is a term for inflammation of hair follicles. It looks like acne with little rings of inflammation surrounding the opening of a hair follicle. In the early stages of a folliculitis, the hair fiber may still be present, but as the folliculitis progresses the hair often falls out. When folliculitis is severe, inflammation is so intense that it can permanently destroy the hair follicles, leaving little bald patches.
There are non-infectious forms of folliculitis, such as those caused by oils and greases applied to the skin that clog up the hair follicles, but folliculitis is usually due to a bacterial infection. Particularly common is an infection of the hair follicles by Staphylococcus aureus. “Hot tub folliculitis” is caused by Pseudomonas aeruginosa which grows in inadequately chlorinated water