My lil one is getting such red rashes around his body. What could be the reason ?

A. there can be many reasons for sudden allergic reactions in babies. it could be certain foods or certain soaps or oils that can cause it. even certain detergents can cause it. you need to carefully identify it. these days due to the the weather changes this can happen in babues with dry skin . try applying coconut oil and see if it helps. even baby cetaphil lotion is good. but depends on what suits your baby's skin type. apply in small area first and see if it works. if still doesn't reduce please consult your pediatrician itself once and get the baby seen.