For hair loss, the need for test depends on the underlying cause of the hair loss.
For male pattern hair loss, this is usually a clinical diagnosis based on the history and pattern of hair loss and blood tests are not usually necessary.
For other causes of hair loss, like telogen effluvium, where there is increase in the shedding of hair, blood tests like:
- full blood count
- thyroid function test
- iron levels
- autoimmune screens
These are sometimes done to rule out any underlying cause of the hair loss.