The red marks left by acne are clinically known as acne scarring, which can be treated with medication, chemical peeling treatment, physical therapy, etc. Acne scarring can be categorized into macular scarring, depressed scarring and elevated scarring according to its morphology, and the red marks left by acne belong to the red spots in macular scarring. Red spots are commonly found on light-skinned skin with no elevations or depressions and tend to persist for months. Treatment is mainly with medication, commonly used retinoids such as adapalene and tazarotene, which can reduce hyperpigmentation by affecting melanin formation in melanocytes. For those with concomitant inflammatory acne, the treatment also needs to target the acne itself, which can be combined with antibiotic ointments such as fusidic acid and lincomycin. Chemical peel therapy involves the use of chemical peeling agents such as salicylic acid and fruit acids applied to the lesions to stimulate the dermis to initiate repair mechanisms that can improve the appearance. Physical therapy methods, such as fractional laser, intense pulsed light, radiofrequency therapy, etc., can also be used, which can activate tissue repair and improve the appearance of the lesions in a minimally invasive or non-invasive way. Specific treatment measures vary from individual to individual, so it is recommended to seek medical advice in time and follow the doctor’s instructions for medication and treatment.