Hi,
Thanks for your query on HealthcareMagic.
I carefully read your query.
Don't worry it's not a serious condition for your leg.
I managed this type of condition before.
Normally the pain behind the heel is caused by Achilles
tendinitis.
It usually occurs in athletes, long walking person, trauma.
The main management is give rest of Achilles tendon.
Cold compression, Wear a heel pad which will help in lowering pain.
Sometimes a painkiller like
ibuprofen,
ketorolac, will help you.
It takes several weeks to complete cure.
So keep patience and follow the instraction.
Hope i have answered your question.
Wish your good health.