There are not much details in the question about the age, occupation, overall health and body structure and other health issues. Hence it may not be possible to suggest any specific remedies.
However I may suggest some general suggestions assuming you are normal healthy and normal in other parameters.
1. Examine your heels after washing clean with soap and warm water. Ensure there is no inflammation or wound.
2. Apply common popular pain relieving ointments or oils externally at the affected heel.
3. If you are walking a lot for your work or for other purpose, reduce the speed, distance and duration if possible. Otherwise take short period rest after some walking and relieve strain on the heels.
4. Check your footwear and if they are worn out at heels, change to new comfortable footwear.
5. Whenever possible keep foot at knee level on a teapoy or stool, so that the heels get rest.
6. Dissolve some common salt in comfortably warm water and dip feet in that and keep for some time.
7. If you have a habit of keeping feet exposed while sleeping at night, especially during cold season or under fan, cover feet also.
8. Take a common simple pain and inflammation relieving, muscle relaxant tablet for two days. Do not exceed the dose and frequency.
If by all these if the pain does not subside or stop, then you have to consult a qualified doctor.