Hello, there are many reasons for hair loss. Generally speaking, excessive stress, overthinking, unbalanced nutrition, or some chronic diseases can lead to hair loss. It is suggested to relax and be optimistic at ordinary times, don't put too much pressure on the spirit, eat more fruits and vegetables, pay attention to nutrition, appropriately increase physical exercise, increase the function of hair to make melanocytes, and eat more foods that are conducive to hair growth, such as walnuts, fungus and black sesame seeds.