There is no such thing as a good red mole on both sides of the breast. If there is no tendency for malignant changes, there is no need for special treatment. If there is a tendency for malignant changes, active treatment is needed. Red moles on both sides of the breast are generally pigmented nevi, which are flat or elevated benign neoplasms composed of nevus cells, and the number of pigmented nevi on exposed areas can be increased after exposure to sunlight. Pigmented nevi usually have no obvious symptoms, but some pigmented nevi may turn into melanoma. Therefore, there is no such thing as “whether it is good to have red moles on both sides of the breast”, but it mainly depends on whether the pigmented nevus has the tendency to become malignant or not. If it is found after diagnosis that the pigmented nevus has the tendency to turn into melanoma or if there is a need to get rid of the nevus, it can be treated by surgical treatment, laser treatment, freezing treatment, electrocautery treatment and other methods. Daily attention should be paid to minimize friction to avoid damaging the mole.