I ve seen commercials that recommend foot orthotics that are supposed to help with knee pain. At least you ve been to a physician who has ruled out damage to your knee. Orthotics could possibly help if you have a problem with your feet with either excessive supination or excessive pronation. Excessive pronation is a common biomechanical problem that occurs when the arch collapses upon weight bearing. Too much of this motion can cause stress or inflammation on the planter fascia, possibly leading to discomfort and other foot problems.
Symptoms consist of heel and arch pain.
Excessive pronation can also lead to plantar fascitis, heel spurs, metatarsalgia, post-tibial tendonitis and bunions as well as knee and lower back pain. Flexible, flat feet commonly cause this condition. Flat feet may be hereditary or caused by obesity or pregnancy. This type of foot usually does not pronate enough. Because the arch does not flatten, it is not an effective shock absorber.