Local soft tissue lesions, such as contusions or lacerations to the subcutaneous fascia or muscles after a local trauma, may cause a local pit or a hard knot in the leg during the recovery process. In addition, it is also possible that the local soft tissue is affected by bacterial inflammation and the infection slowly recovers, resulting in local adhesions in the subcutaneous tissue and tissue adhesions that lead to a local concave pit. It may also be a normal condition, such as the V-shaped end of the flounder and gastrocnemius muscles on the back of the calf. In the location of the top of the V-shaped, if the person’s posterior calf muscles are thicker or thinner people can also feel the concave pit, this is a normal performance, no special treatment.