If there is infection near heel then you may need to wait for surgery.
Its not a emergency surgery,so you need to consult doctor
and confirm that there is no infection in swelling .
Apply a supportive splint
and keep limb elevated to reduce pressure.
Hope this answers your query. If you have additional questions or follow up queries then please do not hesitate in writing to us. I will be happy to answer your queries.
Wishing you good health.