Women’s left knee pain is mostly caused by osteoarthritis, meniscus injury and rheumatoid arthritis, which can be treated with general treatment, physical therapy, medication and surgery according to different causes. 1. Osteoarthritis: If the patient suffers from severe osteoarthritis, which can involve the medial compartment and lead to pain on the inside of the knee of the left leg, the patient can take oral ibuprofen, diclofenac sodium and other medicines, or be treated through surgery. Physical therapy, such as ultrasound physiotherapy, can also be taken to improve local blood circulation and relieve the symptoms of pain. 2. Meniscus injury: if the patient has meniscus injury, it will lead to the left leg knee pain, the patient should immediately stop the activity, rest in place, ice as soon as possible, straighten and fix the affected limb, elevate the affected limb. You can take oral ibuprofen, diclofenac and other drugs for treatment, can effectively relieve meniscus pain, reduce joint swelling and pain, if the condition is more serious, you can also be treated through surgery. 3. Rheumatoid arthritis: Patients who suffer from rheumatoid arthritis may also experience pain on the inside of the left knee, which may even be accompanied by localized redness and swelling, and can be treated with oral indomethacin, ibuprofen and other drugs. Female patients who have left leg knee pain, it is recommended that timely medical examination, and under the guidance of the doctor for treatment, the use of drugs, follow the doctor’s instructions, to avoid unauthorized use of drugs to cause adverse effects.