Sweaty feet and smelly feet in summer may be caused by thick shoes and socks, hyperhidrosis of the hands and feet, and other reasons. Depending on the situation, it can be treated by improving daily habits and applying symptomatic medications externally. 1. Thick shoes and socks: If you wear too thick shoes and socks in the summer, it will lead to lack of air permeability, resulting in a lot of sweaty feet, and the feet will smell bad if they are soaked in sweaty shoes for a long time. After sweating or cleaning, you should dry your feet and keep them dry, which can reduce the probability of odor, wear cotton or linen socks with good sweat absorption properties and shoes with good breathability. 2. Hand-foot hyperhidrosis: It means that hands and feet sweat easily, and the sweat is fermented by bacteria, which will produce an unpleasant and irritating odor, so there will be easy sweating and smelly feet. You can apply or use solutions that inhibit the secretion of sweat glands, such as formaldehyde solution, aluminum acetate solution, aluminum chloride solution, to inhibit sweating of the feet, and try to wear ventilated and breathable shoes and socks to reduce excessive sweating of the feet. Appear summer sweaty feet feet odor, if it is bad habits should pay attention to keep the feet clean and dry, pathological causes should go to the hospital in time, with the help of the doctor to clarify the cause of the disease, and targeted treatment or treatment.