Can Plantar Fasciitis Cause Knee Pain? Untreated plantar fasciitis not only causes persistent foot discomfort but can also gradually lead to weakened knees and contribute to pain in the ankles, hips, and lower back. Plantar fasciitis, a prevalent foot condition affecting a large number of individuals worldwide, presents with inflammation and irritation of the plantar fascia—a thick tissue band that runs along the foot's underside. Although primarily impacting the foot, plantar fasciitis often … [Read more...]