- Adductor longus TrPs.
- Torn meniscus, tendonitis, and bursitis.
- Chondromalacia patellae – more common in runners.
- Patellofemoral dysfunction
- Diabetic patients who inject insulin into the front of the thigh may inject a latent TrP in the rectus femoris or the vastus lateralis and cause it to activate.
- Sudden eccentric contraction such as stepping into a hole, stepping off a curb, or stumbling.
- Exercising such as deep knee bends
- Hamstring tightness can cause a sustained overload in the rectus femoris, which can cause a person to complain of referred pain from the rectus.
- Active soleus TrPs can restrict ankle dorsiflexion and overload the rectus.
- Immobilization of the knee from a cast or brace can activate TrPs and cause a pain complaint after the device is removed.
- Sitting with the foot tucked under the buttock, which may be a subconscious way of correcting a small hemipelvis.
- Avoid overload by learning to correctly pick up heavy objects from the floor which will spare the quadriceps as well as the paraspinals (back muscles).
- Deep knee bends and full squats should be prohibited as so not to overload the quadriceps. A partial squat, however, is relatively safe if the thigh does not drop lower than the horizontal position, which would be parallel to the floor.
Simons DG, Travell JG, Simons LS, Myofascial Pain and Dysfunction: The Trigger Point Manual, vol 1, 2nd Ed. Baltimore: Williams and Wilkins, 1999.
Travell JG, Simons DG, Myofascial Pain and Dysfunction, vol 2. Baltimore: Williams & Wilkins, 1992.
This information is not intended to diagnose, treat, or cure any disease.
A proper diagnosis should be sought from a licensed health care provider.