Rough skin after calf injury is mainly caused by a large area of injury, not timely use of medication, skin infection after injury or frequent scratching. 1. The injured area is too large, exceeding the repair capacity of skin collagen, and the broken part of the skin is mainly filled by skin fibrous protein. As a result, the skin has low elasticity and is rough and hypertrophied. 2. After a large area of burns, if you do not timely use of medication, resulting in poor skin recovery, after the recovery is easy to leave the skin rough or large area of hyperpigmentation. 3. Infections occur after improper wound care, microbial metabolites stimulate the skin easily lead to slow wound healing, after healing, the skin is prone to scarring, skin roughness or hyperpigmentation. 4. Larger and deeper wounds are prone to itching during the healing period, and some patients will scratch repeatedly, which can lead to skin roughness and hypertrophy in the long term. There may be other reasons for rough skin after calf injury, it is recommended to go to the hospital in time.