It is likely to be due to the presence of diseases such as restrictive hyperhidrosis and odorous sweating in the patient. The disease can be determined by examination and then the disease can be treated with medication, such as 25% aluminium chloride solution, 5% to 10% formaldehyde solution, or a foot soak with potassium permanganate solution. It is also important to pay attention to foot hygiene in general and change socks regularly.