Dear,
It may be due to Plantar fasciitis
Apply Contrast Bath, Take 2 buckets one with Hot water and 2nd with cold water.
Put your leg fist in Hot water for 3 mins then in Cold water for 1 min
Do this by alternate legs for 20 mins Twice a day
Next Steps
visit a good physiotherapy centre nearby you where they will give you pain releiving modalities and some exercises
Health Tips
Wear soft soul foot wears, avoid standing for long time till the pain gets relieved and do little Streching exercises