A torn or ruptured plantar fascia---the thick connective tissue that supports the arch of the foot---is a serious injury that requires serious treatment and rehabilitation. This injury is a result of the entire plantar fascia ligament becoming torn due to serious stress that caused the ligament to pull away from the heel bone.
According to Dr. Stephen M. Pribut, who specialises in podiatric sports medicine, full recovery time for torn plantar fascia typically takes between seven and 12 weeks.
The torn plantar fascia is usually treated for one to three weeks in a non-weight-bearing cast and in a total casting for four to six weeks.
The plantar fascia can rupture if it is involved in high speed activities. Ill-fitting shoes with soft soles that bend in the arch may also contribute. Athletes such as runners who increase their training substantially in a short period of time can also cause this injury.
Symptoms of torn plantar fascia include inflammation, sharp pain and formation of bruises on the affected area.
There are exercises that can be done to help prevent injury to the plantar fascia. Toe curls, calf stretches and plantar flexions are all effective in strengthening your foot muscles.