E. coli on the skin may appear redness, swelling, itching, pain and other symptoms As E. coli is a conditionally pathogenic bacteria, if the skin is infected by E. coli, the skin of the infected area can be seen red in the early stage, accompanied by itching sensation, with the development of the disease will appear symptoms such as rashes, erythema, blisters, etc., and when the lesions ulcerated can cause pus, and even accompanied by systemic reactions such as fever and other symptoms. E. coli belongs to the normal host bacteria in the human intestinal tract, mainly through fecal-oral transmission. When the patient suffers from immune system diseases or localized skin lesions, after contact with E. coli, it will cause E. coli infection on the skin surface or wounds of the skin lesions. If the above symptoms occur, it is recommended to go to the hospital in time for early and regular treatment.