1. Patients with seborrheic alopecia (i.e. androgenic alopecia) 2. Patients with scarring alopecia, including hair loss caused by surgery, trauma, and burns. 3. Infectious alopecia: hair loss caused by infections such as boils and carbuncles. 4. Post-surgical alopecia: hair loss caused by surgical procedures such as tumor removal and wrinkle removal surgery. 5. The absence or thinning of eyebrows, eyelashes, beard, pubic hair, chest hair caused by various reasons. 6. Hairline reshaping, beauty tip reconstruction and eyebrow and eyelash encryption for cosmetic purposes.