The weather is hot and my neck itches. What's like prickly heat? How to treat it?

It's prickly heat, right? You should pay attention to keep dry in summer. Sweating is easy to breed bacteria and so on. Talcum powder is a must. I suggest you try the pearl prickly heat powder of diamond, which is very gentle and bought for the baby. I painted the prickly heat on my neck with that powder some time ago, and it will be fine in two days. You can try it and see if it works. Anyway, it is added with pearl powder, which can be used as whitening skin when it has nothing to wear. I like it myself. If it doesn't improve, I suggest you see a dermatologist. It is normal to have prickly heat in summer. Don't worry.