There are four main reasons for shoulder pinching pain: 1. It is due to soft tissue strains in the shoulder joint position, which can lead to local bruising and inflammatory edema. This can cause significant pain when pinching the shoulder, as these strained lesions will be stimulated and the inflammatory edema and bruising will stimulate other tissues around the shoulder. 2. 3.It is due to the soft tissue adhesions in the shoulder joint area, after the adhesions appear, when the shoulder is pinched again, it will cause the adhesions to be stretched and there will be obvious pain. 4.It is possible that the skin has abrasions, contusions or too much skin irritation to form a sterile inflammation, which will stimulate the peripheral nerves, and when the shoulder is pinched by hand, it will cause the lesions to be stimulated and there will be obvious pain.