Hello Good Evening, It seems to septic arthritis, brief details as follows: Septic arthritis is the purulent invasion of a joint by an infectious agent which produces arthritis, and is considered a medical emergency. The usual etiology of septic arthritis is bacterial, but viral, mycobacterial, and fungal arthritis occur occasionally. Septic arthritis should be considered whenever one is assessing a patient with rapid onset of joint pain. Usually only one joint is affected (monoarthritis). Pain can be significant with any movement. May have associated swelling, redness & warmth. In the case of gonorrhea the knee or wrist may be chronically affected. Following tests should be done: -Aspiration (giving a turbid, non-viscous fluid), Gram stain and culture of fluid from the joint. -TLC -ESR -CRP -X-ray of the joint -Ultrasound of the joint So go to the orthopedic surgeon for further management including intravenous antibiotics, analgesia and may be washout/aspiration of the joint. Regards, Dr. Naresh Jain.