Androgenetic Alopecia (Male and Female Pattern Baldness), This is the most common type of hair loss, affecting both men and women. It is often hereditary and is characterised by a gradual, patterned loss of hair. In men, it typically results in a receding hairline and balding at the crown, while in women, it leads to thinning of the hair. Alopecia Areata, this autoimmune disorder causes sudden, patchy hair loss. It can affect any hair-bearing area, including the scalp, eyebrows, and eyelashes. In some cases, it may progress to total hair loss (alopecia totalis) or loss of all body hair (alopecia universalis).