Hay, mahirap sabihin based sa description lang, kasi maraming possibilities, could be heat rash, food allergy, or even tigdas hangin talaga, pero mas importante na ipakita mo sa doctor para sure na alam natin kung ano talaga at paano i-treat properly. One of my mum friends' baby also had red spots dati and akala namin allergy, pero eczema pala, kaya really best na mag-consult na lang para peace of mind mo at para makagawa ng right action agad.