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 ...
Disorders of the nerves to the feet may cause numbness and burning sensation in the feet known as peripheral neuropathy. Plantar warts commonly found on the bottom of the foot are caused by a virus and can cause irritation. Athlete's foot, which is caused by a fungus, also can lead to foot irritation.