There are many spots on the back, which have been for many years, but they are not painful or itchy, as shown in the figure below
Condition Analysis:
The 23-year-old male has many spots on his back for many years, but it doesn't hurt or itch. From the picture, these should be typical symptoms of perihair keratosis. I think this situation doesn't need to be treated at all, and there is no good medicine. If you want to deal with it, you can apply adapalin ointment for a period of time to see the effect
Condition Analysis:
It seems that perihair keratosis is related, so this phenomenon will occur, but it is generally not serious and no special treatment is required. If it doesn't affect your health, you can take more baths. If you feel uncomfortable, you can consider doing laser treatment.
Condition Analysis:
This kind of spot on the back should be paid attention to. Try to give effective treatment combined with local drugs to improve and control the symptoms of the disease. At ordinary times, we must pay attention not to eat some irritating food, or we need to eat some light diet to improve and control the symptoms of the disease.