Dense black spots on the calves need to be eliminated according to the specific causes, such as keratosis pilaris, post-inflammatory hyperpigmentation, pigmented purpuric dermatosis, etc., and after diagnosis, choose general treatment, medication, physical therapy and other ways. 1. Keratosis pilaris: dense black dots on the calves may belong to keratosis pilaris, usually without treatment, if it affects the appearance of the choice of retinoic acid cream, urea ointment, and other drugs to be used externally, and at the same time, to do a good job of daily skin care work. 2. Post-inflammatory hyperpigmentation: dense black dots on the calves may be due to post-inflammatory hyperpigmentation, if the symptoms are more serious, you can choose to eliminate the small black dots through laser treatment. 3. pigmented purpura skin disease: dense black dots on the calves may be due to pigmented purpura skin disease, patients need to elevate the affected limbs, avoid standing for a long time, while oral vitamin C, loratadine and other antihistamines to improve the symptoms. There are many reasons why there are dense black spots on the calf, after the symptoms, we recommend that you go to the hospital in time to improve the examination, follow the doctor’s instructions to take standardized treatment, do not ignore the symptoms, take it lightly, so as not to lead to adverse consequences.