The common diseases that make it hard to lift the arm in pain include shoulder dislocation, fracture around the shoulder joint, frozen shoulder, etc. The causes are different and the treatment methods are different, so you should consult a doctor in time for treatment. If it is a dislocation of the shoulder joint that causes pain in lifting the arm, it can be treated under the guidance of a doctor through manipulation, the use of non-steroidal anti-inflammatory drugs and other analgesics, and surgical repositioning. If it is a fracture around the shoulder joint that causes the arm to be too painful to lift, it can be treated by surgical repositioning, cast immobilization, oral painkillers, etc. under the guidance of a doctor. If the pain in the arm is caused by periarthritis, it can be treated by functional exercises, oral non-steroidal anti-inflammatory drugs (such as ibuprofen, etc.), and surgical treatment under the guidance of the doctor. Patients with symptoms of arm pain that can’t be lifted should go to the hospital in time and ask the doctor to give treatment so as not to delay the condition.