Re: Rashes I have had and have.
Sounds like eczema to me.
The best thing for eczema is to find a moisturizer that works well for you and apply it every day as soon as you get out of the shower. When you shower, use a gentle soap. My family buys only Dove Sensitive Skin soap.
When it flares up, use a hydrocortisone cream just until it gets better. You don't want to use it more than a week or two, because it can thin the skin.
If this isn't working, save up some money to see a dermatologist. Don't waste money on a walk-in clinic, ER or family doctor, they are not well equipped to help you manage this in the long run. Ask the dermatologist for samples and possibly help with prescription costs. There are some really good new eczema treatments out there, but they can be expensive.