As a quick reminder, the different categories of insulin are: 1  Rapid-acting. 2  Short-acting (regular). 3  Intermediate-acting. 4  Long-acting.
This condition may also affect people with kidney problems, as a loss of protein in the urine can cause feet to swell. Another cause of foot swelling is inactivity ... in a car or riding on an airplane all day, your leg muscles aren't working as much, and fluid will pool in your feet and legs ...
There are likely to be other possible causes, so ask your doctor about your symptoms. 1  Simple reasons for foot pain include: Over-use of feet. 2  Foot fracture Calcaneal fracture. 3  Iatrogenic foot disorder - see iatrogenic disorders.  Ankle conditions Ankle 1  pain. Joint conditions Arthritis.  Athlete's foot.