Frozen shoulder does not usually cause breast swelling. Frozen shoulder mainly causes pain in the shoulder joint, accompanied by limited movement in all directions of the shoulder joint, and the pain is mainly at night, usually occurs in the age of about 50 years, and some may have pain and discomfort in the shoulder blade area. It seldom affects the muscle tissues of the breasts and therefore does not cause breast swelling. Breast distension in young and middle-aged women is mostly caused by poor local blood circulation during physiological period, in addition, breast hyperplasia and local breast tumors can also cause breast distension and breast distension. If physiological factors are excluded, it is necessary to go to the hospital in time to improve the relevant examinations such as ultrasound to further evaluate whether there are other pathologies.