Will washing feet with cold water cause foot odor?
Whether washing feet with cold water causes foot odor generally depends on specific factors such as foot hygiene, individual differences, and post-washing care practices. If troubled by foot odor, it is advisable to adjust your foot-cleaning habits promptly or consult a doctor to rule out issues like fungal infections. The detailed analysis is as follows:

When there is no significant sweat accumulation and the skin is healthy, washing feet with cold water usually does not cause foot odor. Cold water can clean dust and light perspiration from the skin surface. If the feet are thoroughly dried after washing, kept dry, and breathable socks and shoes are worn, bacterial growth is minimized, preventing noticeable odor. In such cases, washing feet with cold water is acceptable.
However, when excessive sweating occurs or when there is skin damage, washing feet with cold water may easily trigger foot odor. Sweat contains abundant nutrients for bacteria, and cold water lacks sufficient cleansing power to remove sweat completely. Residual sweat creates a breeding ground for bacteria, which then produce foul odors through decomposition. Additionally, in cases of broken skin, cold water may irritate the area, worsen discomfort, and increase the risk of infection. Therefore, cold water foot washing is not recommended under these conditions.
When washing feet, use a mild soap to clean the feet thoroughly, paying special attention to the spaces between toes. Dry feet completely afterward with a clean towel. Choose cotton socks with good sweat absorption, change them daily, and air them out regularly. Wear shoes made of breathable materials, avoid wearing the same pair for extended periods, and periodically place shoes in well-ventilated areas to eliminate bacteria and odor. If foot odor persists, consider using foot care products with antibacterial properties.