I got Skin Allergy

Few days ago when it gets cold here I wore my thermal pants to be comfortable. But that was big mistake because right after I wore that thermal pants I got allergy around my waist. I was allergic to the elastic on that thermal pants. Until now its real red I already put 3 different kinds of cream on it but it still it didn't get any better.

Its really ugly looking skin I don't know what to do with it anymore maybe see a dermatologist soon. I am afraid that my baby will get it too so I really need to get rid of this very soon. That thermal pants got to go. But I know I still need one on cold winter season. Maybe I'll get some without elastic on it.