There are several different forms of alopecia. Total hair loss on the head is known as alopecia totalis, while loss of all body hair is known as alopecia universalis. Alopecia areata is perhaps the most common form and here hair is lost in patches. This latter form can develop quickly and can occur at any age to both men and women.
Most commonly, alopecia areata is caused by problems with the immune system. It is basically a physical manifestation of a problem resulting from hair follicles being attacked by the immune system – a process which prevents hair growth. It is an autoimmune disorder and can be associated with allergic reactions, thyroid problems, ulcerative colitis and other physical issues. There also seems to be a genetic role as it is common for it to strike several people within the same family.
If you are suffering hair loss, there are many different treatments nowadays. Corticosteroids are often prescribed and these will often control the autoimmune reactions that are preventing hair growth. However, many other treatments are used and the first step should always be to consult your GP in order to get the exact problem correctly diagnosed.