Aw, bungang araw yan talaga esp pag mainit at maraming singaw, mama! A few of us tried keeping the affected area clean and dry, then applying a gentle moisturizer or even coconut oil, some moms swear by zinc-based creams din, kaya try mo tingnan sa drugstore like Sudocrem. If it doesn't improve after a week or looks infected, best to check with your pedia or dermatologist na lang para sure, lalo na kung first time mo lang makita yan sa baby.