Capillary rupture on the shoulder may be caused by age factor, physical factor stimulation, disease factor and other reasons. 1. Age factor: along with the growth of people’s age, the elasticity of blood vessels will gradually reduce, the expansion of capillaries increased significantly, resulting in an increase in the fragility of capillaries, which may cause capillary rupture on the shoulder. 2. Physical stimulation: physical stimulation such as excessive friction, impact or scratches on the skin in the shoulder area may cause damage to the capillary wall, thus causing capillary rupture in the shoulder. 3. Disease factors: common in aplastic anemia, hemophilia, diabetes, hyperthyroidism and other diseases, may lead to the patient’s capillary dilatation, likely to cause capillary rupture, which may occur on the shoulder capillary rupture. Shoulder capillary rupture, may also be caused by other reasons, it is recommended to seek medical advice as soon as possible, by perfecting the relevant examination, diagnosis, and then follow the doctor’s instructions for treatment.