For 2 days, my 7-month-old baby has had small red bumps on his buttocks?

It is recommended to apply a zinc paste with a concentration of 40%, such as Zincofax extra strength, to the affected area. This should be applied at each diaper change, and the diaper should be checked frequently and changed when wet or soiled. It may also be helpful to let the baby go without a diaper for a period of time, depending on their mobility. Use fragrance-free wipes for cleaning and avoid rubbing too hard. If the rash persists for more than 5 to 7 days without improvement, it is advisable to consult a doctor as a precaution.