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At-home red-light treatment is generally safe for all skin types, especially when used as directed with devices cleared by the Food and Drug Administration. Unlike medications like topical minoxidil or finasteride, heat-based laser treatments, or even hair transplants, red-light therapy is non-invasive—and side effects are rare. “Some people feel a little warmth on their scalp. A few may get slight redness, but it goes away quickly. No pain, no peeling, and nothing harmful,” says Dr. Johnson. Of course, you should always follow manufacturer instructions and consult your doctor if you have any underlying skin or scalp conditions and are concerned about the effects of red light. (责任编辑：) |