One common cause of foot pain and ankle pain is an injury called plantar fasciitis (fashee-EYE-tiss). If your first few steps out of bed in the morning cause severe foot pain in the heel of your foot, you may have plantar fasciitis. It's an overuse foot injury affecting the sole (bottom) or flexor surface (plantar) of the foot. A diagnosis of plantar fasciitis means you have inflamed the tough, fibrous band of tissue (fascia) connecting your heel bone to the base of your toes.
Symptoms

The condition starts gradually with mild foot pain at the heel bone often referred to as a stone bruise. You're more likely to feel it after (not during) exercise. This foot pain often occurs again after arising from a midday lunch break.
If you don't treat plantar fasciitis, it may become a chronic condition. You may not be able to keep up your level of activity and you may also develop symptoms of foot, knee, hip, or back problems as well as other foot and ankle pains, because of the way plantar fasciitis changes the way you walk.
Treatments

- Rest and NSAIDs
- Exercise
- Rehabilitation