Alopecia is the general medical term for hair loss. There are many types of hair loss with different symptoms and causes. Some of the more common types of hair loss are male- and female-pattern baldness, alopecia areata, scarring alopecia, anagen effluvium, telogen effluvium. Alopecia areata usually begins when clumps of hair fall out, resulting in totally smooth, round hairless patches on the scalp. In some cases the hair may become thinner without noticeable patches of baldness, or it may grow and break off, leaving short stubs.
Scleroderma is a condition affecting the body's connective tissues, resulting in hard, puffy and itchy skin, lichen planus is an itchy rash affecting many areas of the body, discoid lupus is a mild form of lupus affecting the skin, causing scaly marks and hair loss, folliculitis decalvans is a rare form of alopecia that most commonly affects men, causing baldness and scarring of the affected areas, frontal fibrosing alopecia is a type of alopecia that affects post-menopausal women where the hair follicles are damaged, and the hair falls out and is unable to grow back.
Male-pattern baldness, don't need treatment because they're a natural part of ageing and don't pose a risk to your health and if the hair loss is due to cosmetic reasons then two medications called finasteride and minoxidil can be used. These treatments don't work for everyone and only work for as long as they're continued. Minoxidil can also be used to treat female-pattern baldness. Alopecia areata is usually treated with steroid injections, although it's sometimes possible to use a steroid cream, gel or ointment.