Millet-like white dots on the palms of the feet may be caused by plantar warts, tinea pedis, and so on. The plantar wart is a kind of good in the sole of the foot, heel toe seam and other parts of the frequent friction, is a kind of infectious disease caused by the human papilloma virus, the early manifestation of point-like white lesions, the late white spots will expand, become a papillary round or irregular hyperplasia, you can also see capillary rupture blood clotting produced by the small black spots. Foot infection fungi lead to tinea pedis may also appear rice grain size white spots, or erythema, scales with itching, shared slippers and other items, other parts of the body ringworm infection can lead to disease. If you find a small rice grain white spots on the palms of your feet, it is recommended that you seek medical attention in a timely manner, under the guidance of a physician, and use reasonable medication to treat the disease.