Redness and swelling of foot odor is usually caused by secondary bacterial infection, which can be treated with both antifungal and antibiotic medications. If foot odor is accompanied by redness and swelling, it is usually caused by a bacterial infection in the vesicles. You can use povidone-iodine to disinfect the area and antibiotics such as mupirocin ointment, fusidic acid cream, etc. If the infection is serious, you can take oral antibiotics such as cefixime. In addition, you need to use antifungal drugs to treat foot odor at the same time, such as terbinafine spray. If the phenomenon of redness and swelling of foot odor is serious, you should go to the hospital in time for examination, the use of the above drugs should follow the doctor’s instructions, do not self-medication.