Shoulder pain is very common in life. Many people think of frozen shoulder when they have shoulder pain, and then they start taking medication and applying topical creams to activate the blood circulation and remove blood stasis. However, you should know that many shoulder pains are not frozen shoulder, and only 1 out of 5 shoulder pains is frozen shoulder. Therefore, the probability of it happening is not high, but there are 3 major characteristics of frozen shoulder. 1. Frozen shoulder often occurs around the age of 50, so we often call it 50 shoulder. 2, Frozen shoulder often has a three-part process. Part 1: Frozen shoulder is often painful at the beginning; Part 2: Slowly and gradually stiffens; Part 3: Slowly the self will ease. If you have been in pain or stiff for a long time (one or two years), you must pay attention to rule out other causes. 3. You can ask your family to lift your shoulder. If there are other problems, this shoulder joint can be lifted passively. If you can’t lift it, then it may be frozen shoulder.