The Achilles tendon is the largest tendon in the body. It connects the two main calf muscles – the gastrocnemius and soleus – to the heel bone (the calcaneus). Common injuries of the Achilles tendon include tendonitis (inflammation), tendinosis (degeneration), and rupture.

This condition is a thickening of the nerve sheath that surrounds a nerve in the ball of the foot. It most commonly develops between the third and fourth toes. It also commonly occurs between the second and third toes.

Plantar fasciitis is an irritation of the plantar fascia. This thick band of connective tissue travels across the bottom of the foot between the toes and the heel. It supports the foot’s natural arch. It stretches and becomes taut whenever the foot bears weight.

This condition is an overstretching and inflammation of the posterior tibial tendon, which travels from a muscle in the calf down to the arch of the foot. This tendon is one of the major supporting structures of the foot’s arch and aids in walking.