Thigh pain after hip replacement can be caused by various factors such as tissue damage during surgery, incorrect placement of the joint, or inflammation due to the body's response to the implant. It is important to consult with your doctor if you experience persistent or severe thigh pain after hip replacement surgery.

* Thigh pain after hip replacement may be mild to moderate, 

   Thigh pain after hip replacement,  may or may not require therapeutic intervention 
* Usually some discomfort in the hip and thigh region is common as body adjusts to the changes made in that area.
* Thigh pain after surgery may be due to dislocation of the implant 
* Or due to fracture around the implant 
* Thigh pain may also be due to changes in the length of the leg, some exercises will help to increase the mobility and strength 
* If thigh pain is more while walk and ok at rest, then it might be due to loode acetabular cup component.
* In some cases it may be due to bone prosthesis micromotion
* Excess stress transfer to the femur bone 
* Tendonitis I.e. inflammation around the tendons can cause thigh pain
* stress fractures, 
* Labral tears
* Cartilage/ tendon tears
* Periosteal irritation
* If thigh pain is immediately after hip surgery few points to be ruled out are
- subtle infection 
- femur fracture
- loose implants that doesn't allow bone to grow into the implant due to too much of micro motion

Main causes  of thigh pain after hip replacement are:
Lack of Physio
Poor bone 
Infection 
You need to consult a orthopedist for treatment.

Thigh pain is often due to the stem position of the the prosthesis and often depends upon the type of surgical approach used. you need to show your x-ray to orthopedist and also start Physiotherapy

Data from studies indicate that thigh pain is a significant complication after successful cementless total hip replacement surgery. In most cases, reported symptoms are mild to moderate, resolve spontaneously or do not progress, and require little or no therapeutic intervention.