Eczema Treatment Care

My baby had a red bump on her hip as I changed her this morning. I put some A+D ointment on it as I thought it may be irritation from diaper. Now, a couple hours later, it is a clear liquid blister with little ones around it. What is that? Could it be simply contact dermatitis from the diaper or something worse? Help!

so bad that my skin cracks. Seems like the cycle does this 2 weeks or so. The dr. seems to think this is contact dermatitis, is there anything else that it may be? He’s been prescribing a steroid for the last year and says regular use may thin my skin over time. I’ve been avoiding the cleanser at work that I thought have caused this but it keeps coming back. I really need some advice on this please!