How to determine if it is excessive fat hair loss or malnutrition hair loss

Seborrheic alopecia is also called androgenic alopecia. In the early stage of alopecia, there will be symptoms such as itchy head and strong scalp oil secretion, followed by a large number of hair loss. Malnutrition alopecia is caused by insufficient nutrition in the body. Before hair loss, hair is dry and dull, followed by a large number of hair loss.