If it is a shallow hole, you can change the skin with fruit acid, peel off the cuticle with high concentration of fruit acid, promote the aging cuticle to fall off, accelerate the renewal of keratinocytes and a small number of epithelial cells, and promote the proliferation of elastic fibers in the dermis. Eliminating acne scars requires many courses of treatment.
If it is a deep concave hole, the concave part can be raised by injecting an implant (such as collagen) to keep it flat with the surrounding skin tissue. You can also do dermabrasion surgery, which can have a good effect only two or three times, and the effect is lasting. However, due to the trauma of laser dermabrasion, it is necessary to cooperate with postoperative maintenance. If the postoperative care is not good, the skin may turn red and black.