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Thigh pain after a total hip replacement is not uncommon, occurring in up to 10% of patients after surgery. The pain felt in the thigh may be coming from the thigh bone (the femur). Bones are living tissues and are sensitive to pressure and stress. When a cementless stem is implanted into the femur, stress must be transmitted from the ball, through the stem, and into the femur. This stress transfer occurs along the stem, but is greatest near the tip of the stem. The thigh pain associated with activities may represent either a stress concentration near the tip of the stem, or an area of motion where the stem tip rubs on the inside of the bone. In any event, if the stem is well fixed, the thigh pain is usually temporary, as the bone will remodel over time to accommodate the changes in stress. In general, thigh pain will occur 3 to 6 months after surgery and can last for 6 to 12 months, gradually resolving. Increased activity, such as walking, can make it worse. Generally, reduced activity with a cane or crutches can help if the pain is moderate to severe. Anti-inflammatory medications may also be helpful. If the pain persists, observation of the femoral stem with serial x-rays should be considered to look for other causes of pain, such as implant loosening. You should talk with your orthopaedic surgeon about your problem so he or she can determine the best remedy.
Thank you for your question!
James Bono, MD, Orthopedic Surgeon
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