I don't know exactly what sort of pain you're having or how severe it is. Going on the assumption that it might be caused by the extra weight, you can do exercises to strengthen your ankles. Lots of people have weakness in the muscles and connective tissue in that area.

This link 12 Ways to Build Ankle Strength has some stretching and balance exercises to help ankles. They're just a suggestion. You can find other exercises by doing an online search. Unless you're having extremely severe pain, stretching and strengthening for your ankles may help.

I just saw a doctor earlier this week and got prescribed some exercises for pain while walking. It has been two days and I haven't done them yet.