Dermatitis can choose Bactrim ointment for application, the composition of this drug is mupirocin, can play anti-inflammatory, antibacterial treatment effect, mainly for the rash for the rash color bright red, appear capillary dilation caused by swelling, but also for vesicles, plasma exudate, especially purulent exudate, pus crust, the application of this anti-inflammatory ointment effect is more ideal, especially for infants and children do not have better anti-allergy This ointment can be very effective when applied to infants and children who do not have better anti-allergy medications to take orally. Dermatitis is mostly caused by bacterial co-infections such as Staphylococcus aureus and Staphylococcus epidermidis, and antibacterial treatment can achieve satisfactory results.