Spots and nodules in the left humeral head may be caused by calcification or local inflammation in the humeral area. 1. Calcification: if the left humeral head calcification, there may be spots and nodules like images, usually occurring muscle or bone strain, induced by the formation of local calcification of the humeral head, there will be local pain, swelling and other symptoms, and the pain will be aggravated by the activity. 2. Local inflammation: osteoporosis of the left humeral head, local infectious lesions caused by bacterial infection, will cause edema or inflammatory exudation of the humeral head bone, resulting in speckled nodule image, usually accompanied by local pain. Spots and nodules in the head of the left humerus may also have other causes, it is recommended to go to the hospital in time to improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment under the guidance of the doctor.