There are several possible causes of hot and itchy feet. One of the more common causes is athlete's foot, a fungal infection of the skin. With this problem, you will
likely see scaling, flaking or cracking of the skin on the bottom of the feet or between the toes. It can be treated by an over the counter antifungal medication, but sometimes a prescription cream or lotion is needed.
Another cause of hot and itchy feet could be peripheral neuropathy. This condition can have many causes including diabetes, alcohol abuse, and vitamin deficiencies, amongst other things.
If your dad's problem does not resolve, you can visit your local podiatrist. He or she can help make the correct diagnosis and come up with a treatment plan.