Under normal circumstances after taking gentian diarrhea pills will not cause knee pain, knee pain is considered to be injury, degenerative changes in the knee joint, knee joint disease, etc., recommend that patients go to the hospital in a timely manner to clarify the cause of the disease. Gentian Diarrhea Liver Pill is a proprietary Chinese medicine, mainly composed of gentian, chaihu, scutellaria, gardenia, zedoaria, mouton, psyllium, angelica sinensis, rhubarb, baked licorice, etc. It has the effect of clearing the liver and gallbladder and facilitating the effect of dampness and heat and is mainly used for the treatment of dampness and heat of the liver and gallbladder, dizziness and redness of the eyes, tinnitus and deafness, coeruleus pain and mouth bitterness (coeruleus and ribs feel pain and the mouth is bitter), redness of the urine, and dampness-heat with menstrual cramps. The adverse reactions and contraindications of this product are not clear, after taking the drug, the number of stools increased and not shaped, should be appropriate to reduce the dosage. There is no clinical data suggesting that this product can cause knee pain. There are several common causes of knee pain. 1. injury: in sports if you do not pay attention to the protection of the knee joint is easy to cause knee injuries, knee injuries will cause knee pain symptoms, the knee is easy to damage the parts including ligaments and meniscus and so on. 2. Degenerative changes in the knee joint: typical degenerative changes in the knee joint include osteoarthritis of the knee joint, rheumatoid arthritis, etc., and this kind of pain is mostly related to the degeneration and exfoliation of articular cartilage. 3. Diseases of the knee joint: special diseases of the knee joint, including inflammation, infection, tuberculosis, tumors, etc., the degree of pain of such diseases is often heavier, in addition to the pain can be accompanied by obvious knee joint redness, swelling, heat and so on. The use of drugs should be carried out in accordance with medical advice. If you feel unwell, you should go to the hospital in time to avoid delay.