Squatting may have the following reasons: First, osteoarthritis of the knee joints, when the osteoarthritis of the knee joints is serious, there can be serious osteophytes, serious cartilage damage, and secondary meniscus damage, and squatting difficulties, then we should carry out the X-ray film of the knee joints, CT examination, to carry out the early diagnosis and early treatment; Second, meniscus injury of the knee joints. Secondly, meniscus injury of both knees, when the posterior horn of the meniscus of both knees has a tear or injury, there can be pain when squatting and the phenomenon of not daring to squat, then we should carry out the MRI of meniscus for diagnosis at an early stage; thirdly, patellofemoral arthritis, when the patellofemoral arthritis of the knee joint is serious, there can be cartilage damage, then there can be pain when bending the knee joint and it leads to the pain when squatting and it is necessary to carry out X-ray of the knee joint and CT examination for early diagnosis and treatment at an early stage. In this case, early diagnosis and treatment should be carried out by X-ray film and nuclear magnetic examination of the knee joint.