achilles tendonitis ankle pain ankle sprain arthritis ball of foot ball of foot pain blisters bony protrusion bruising bunions burning feet callus capsulitis compression flat feet flight socks gout heel spur heel spurs hot feet inflammation loose shoes magnesium spray massage massager metatarsalgia mortons neuroma muscle tightness numbness pain pain relief plantar fasciitis pronation release tension sciatica sesamoiditis shin splints stress fracture supination swelling swollen swollen ankles Synxease tight calves tight muscles