Foci of calcification are calcium-like deposits that appear in lesions such as soft tissues and blood vessel walls and can usually be detected by imaging such as ultrasound, X-ray or CT. Foci of calcification are most often seen in areas of inflammation following bacterial or viral infections and in areas where nodules or tumors are present. Generally asymptomatic calcified foci are not too serious, it belongs to old lesions, the appearance of this symptom usually proves that its primary disease such as inflammation, nodules, etc., has basically reached cure after treatment, usually will not affect the patient’s normal life and life expectancy, and no special treatment is needed. However, since the primary disease at the site of calcification may cause different degrees of local damage and lead to some functional abnormalities, regular physical examination and review are recommended to follow up the condition. However, for calcified tendonitis, hepatitis, thyroid nodules, thyroid cancer, breast cancer and other diseases causing calcified foci will be accompanied by other uncomfortable symptoms that threaten the health of the body and need to be given timely and targeted treatment to actively eliminate the cause in order to achieve symptom relief. Since there are no specific medications available, calcified foci caused by these diseases are generally recommended to be treated by excision of calcified foci, and for calcified tendonitis, arthroscopic removal of calcified foci in the shoulder is an option.