What is the pimple like acne on the chest and scar?

You should have scar constitution, not scar hyperplasia. The cycle of diffusion is very long, and it only spreads a little in almost two or three years. You can leave it alone, but if you want to get rid of it, you can have a cutting operation.

The proportion of people with scar constitution in the crowd is very small, and it only shows up after the wound heals. The increasing surface scars not only affect the appearance, but also affect the functional movement due to local pain and red itching scar contraction. It is precisely because there are few people with scar constitution that some books also call people with keloids scar constitution. Keloid shows that after the wound heals, the scar grows outward, the skin surface is hard, and there may be a feeling of red pain, but it will not continue to expand after growing to a certain extent.

Scar is a very general concept, which is the general name of the appearance, morphology and histopathological changes of normal skin tissue caused by various trauma. It is a normal and inevitable physiological reaction in the process of wound healing after human trauma, and it is also the inevitable result of wound healing process.