70 years old left side often take heavy things, now feel shoulder arm are sore to consider with malnutrition, muscle strain, frozen shoulder, cervical spondylosis, rotator cuff injury and other factors. 1. malnutrition: for some of the recent nutritional intake, dietary imbalance of the 70-year-old people, can be due to the body lack of calcium and other trace elements and the left side of the often heavy things, shoulder and arm are sore phenomena. 2. Muscle strain: when part of the 70-year-old people often left side of the heavy things caused by local muscle, ligament, fascia and other soft tissue strain, can be manifested as shoulder and arm pain phenomenon. Some patients are also prone to swelling, activity limitation and other uncomfortable symptoms. 3. Frozen shoulder: the cause of the disease is not clear, may be related to soft tissue degeneration, long-term excessive activities. Disease can cause part of the 70-year-old left side often take heavy things, now feel shoulder arm are sore phenomenon. 4. cervical spondylosis: disease and cervical degenerative changes, chronic strain injury, etc., can also cause some 70-year-old left side of the often heavy things, now feel the shoulders and arms are sore. Some patients are also prone to neck pain, upper extremity radiating pain, dizziness, tinnitus and other symptoms. 5. Rotator cuff injury: most of them are caused by indirect violence, and lifting heavy objects, wrestling and other triggering factors. The patient’s main symptoms are shoulder pain, activity limitation, localized swelling, etc., can also be manifested as 70 years old left side often take heavy things, and now feel shoulder arm are sore. It is recommended to consult a doctor in time for examination, so as to clarify the cause of the disease and then follow the doctor’s instructions.