A mobile shoulder is usually not a dislocation. A dislocated shoulder, if not properly repositioned, is usually immobile and accompanied by severe pain. After dislocating your shoulder, it is recommended that you seek medical attention in a timely manner. X-rays should be taken to determine the location and severity of the dislocation, and then the dislocated part should be reset by a professional physician. If your shoulder feels like it is dislocated but you can still move it, it is usually not dislocated, but may be tendon spasm, which is mostly caused by overwork, cold and flu, and usually manifests itself as shoulder pain, which is aggravated by activities. When tendon spasm, you can take local massage and hot compresses to ease the way, serious cases need to consult a doctor.