The most common feet pathologies of children are valgus and valgus planus deformities, which are congenital or connected with neurological dysfunctions (Minimal Brain Dysfunction). In adults, and mostly in women, we observe: 1. Köhler’s disease among girls wearing improper shoes. 2. Insufficiency and pain of the front part of feet connected with limited toes flexion, 3. Valgus deformity of the big toes (hallux valgus), 4. “Ankle Joint Pain Syndrome” (AJPS)-sometimes also “Knee Joint Pain Syndrome” (KJPS)-described by us only in USA, India and Czech Republic. In presented article, we describe this special type of foot insufficiency- “instability of ankle or knee, or both joints”-on left leg in drivers and right leg in passengers in countries with right-hand traffic. More frequent it concerns the foot and article focus on this problem.