As you explained that she bis not able to walk for 1 hour, and if the n she feels better it seems to be the pain of Plantarfascitis which is the pain due to the inflammation of a cushion like shock absorbing structure of our heels . it first creates pain in the heel and then travels to the back of stretching. when person starts walking after any kind of rest(prolonged siiting or lying), he / she feels pain at the back of ankle and heel.
Next Steps
Go to a physiotherapist and take the treament.Ultrasonic therapy helps in decreasing the pain and healing of plantarfascia inflamed,Wax therapy increases blood circulation and helps in relieving pain,stretching will increase the range of motion and relaxation.Exercises will increase the muscle strength.Do it for at least 2 weeks.You will get the relief for sure.
Health Tips
At home:- do hot water fomentation twice a day,DO frequent movements of the ankle and foot front and back, rotate the ankles clockwise andanticlockwise at every 2v hours, dont stand too much, use soft footwear and cushion in the footwear. avoid cold exposure....Thanks