My 3 months old baby is having allergy like this for the past 2 weeks. It's spreading a bit in her lower neck. Please tell me if this is because of summer heat or some other allergic reaction?

A. You can use candid dusting powder or the wise you can also go ahead with using calamine lotion which is what is going to be beneficial for you this problem is mostly due to heat in the body but this is going to be a good solution to the problem