Liver function tests are recommended for shoulder pain signals. Liver is a special and complex organ, it is not connected to the pain nerve, for small injuries in the liver, patients generally do not feel pain, but if the mass in the liver changes, such as enlargement, then it will affect the envelope outside the liver, if the external tissue nerves and shoulders are connected to the shoulder, then the shoulder will successively appear pain. Therefore, shoulder pain should be done as early as possible for liver function tests. In addition, if the urine becomes yellow, you should also go to the hospital in time to do liver function tests. Because the liver is the main metabolism, is the body’s largest detoxification organ, once the liver is damaged metabolic disorders, bilirubin can not be metabolized properly, resulting in an increase in its content, into the body of the blood and urine, and ultimately cause the urine to appear yellow.