The reason you can’t take a bath with penicillin is because it may cause infection, catch a cold, and is not conducive to recovery from the disease. Penicillin is a commonly used broad-spectrum antibiotic that is often used to treat various bacterial infections. The human body should avoid taking a bath immediately after taking penicillin, if you want to take a bath, it is recommended to take a bath after 24 hours. 1. cause infection: after playing penicillin will leave pinholes on the skin, at this time if you take a bath, because the bath water is not sterile water, some bacteria in the water will enter the human body with the pinholes to cause infection. 2. Not conducive to the recovery of the disease: penicillin patients themselves are weak, after bathing at this time because the body can not adapt to the outside temperature in a short period of time, it is easy to catch a cold, triggering a cold, resulting in a further decline in physical condition, not conducive to the recovery of the disease. After taking penicillin, you should pay attention to rest, avoid drinking alcohol, eating spicy and stimulating food, and at the same time, you should also disinfect the needle hole site, do not get wet within 24 hours to prevent infection. If any adverse reaction occurs during the period, you should go to the hospital in time for medical examination and treatment.