Hair loss, alopecia, baldness

Medical term for baldness (hair loss) is alopecia. Alopecia is the partial or complete loss of hair—especially on the scalp—either in patches (alopecia areata), on the entire head (alopecia totalis), or over the entire body (alopecia universalis). Hair loss may be caused by a wide variety of factors, four major causes are:

Fungal infection
Alopecia areata
Trauma to the hair shaft
Telogen Effluvium