What Causes Swelling And Pain In Feet Even After Hairline Fracture Is Cured?

i had a hairline fracture in my right feet one inch above the little finger.

i consulted doctor and he adviced to use crap band-aid to cease free movement of the ankle and feet for 3 weeks.After an x-ray report post three weeks shows the fracture has already healed up,as per the doctor.but even now the swelling has not gone and as well severe pain is developed,when i climb stairs or work few miles