Thank you for your query.
As you have not mentioned your age and history of any other illness it is very difficult to given a specific guidance for your problem. If you are also running fever
then you need to consult a doctor to rule out infection of the ankle joint which can be painful, and red. Appropriate investigations shall be done and thereafter a course of antibiotic will have to be given if it is proved to be ankle joint infection.
I hope I have answered your query to your satisfaction.
Wishing you an early recovery.
Rajiv K Khandelwal