Uncomfortable and unspeakable discomfort inside the knee can be caused by factors such as joint inflammation, joint injury and joint effusion. 1. Joint inflammation: Osteoarthritis, rheumatoid arthritis, rheumatoid arthritis and other diseases occurring in the knee joints can cause joint osteophytes and articular cartilage destruction and other changes, which can cause discomfort in the knee area. 2. Joint injury: Trauma can lead to bone and soft tissue injury of the knee joint, which can cause fracture and dislocation of the knee joint, as well as meniscus and ligaments and other soft tissue injuries, which can lead to discomfort in the knee area. 3. Joint effusion: injury, inflammation and damage to the knee joint can cause knee joint effusion, and when the amount of knee joint effusion is large, it can increase the pressure in the knee joint cavity, leading to discomfort symptoms such as suffocation in the knee joint. When the inside of the knee is uncomfortable, unspeakably difficult, should promptly consult a doctor, under the guidance of a specialist to actively carry out appropriate treatment, will help to alleviate the discomfort as soon as possible.