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Medical conditions such as diabetes can cause foot cramps due to the lack of oxygen supplied to the feet. It is very important that you eat properly and get enough vitamins and minerals. A lack of potassium in your system can cause cramps in your feet and legs. Vitamin D is also important to healthy feet and bones.
Vitamin B6 Defciency. Foot cramps can also be caused by a lack of vitamin B6, says the Health Guidance website. This vitamin is essential for the healthy functioning of your nervous system and can be found in pork, poultry, fish, eggs and fruit and vegetables.