The problem seems to be due to local inflammation of the soft tissue towards the base of heel.. called Plantar fasciitis .
Next Steps
She needs to start with hot fomentation, use a soft sole footwear even at home, start ankle movement exercises, take analgesic with anti inflammatory medicines, apply analgesic ointment locally. If possible, physiotherapy can also be started..
Health Tips
Avoid walking barefoot, avoid walking on hard surface, avoid standing for a long time..