Round itch welts that last over a week and sometimes leave hyperpigmentation.

[Jaimecam]

For the past year I’ve been getting welts about the size of quarters or larger that appear anywhere on my body but mostly on hips, thighs, between elbows and knees, and in armpit area. I nearly always have at least one or two welts but can have up to 30 at a time, especially during times of stress. The welts are very itchy and often wake me up at night. They last about a five days and slowly shrink, so after about a week they are mostly gone. Sometimes they appear to have a head when they start to shrink, which makes me think it could have something to do with a hair follicle issue. I had laser hair removal on my legs and have only about 20% of hair on my legs so I’m wondering it really is from a hair follicle. Many times the welts do leave hyperpigmentation marks, so I have marks all over my body. My regular doctor thought I could have psoriasis, but didn’t really investigate it.  I personally don’t think the welts look like psoriasis because they never get dry or scaly and are always circular. I went to a dermatologist who thought they could be a type of eczema and she gave me a cream but it didn’t help. I’m thinking it could be hives but because the welts always last for about a week I’m not sure. I am not able to go see the dermatologist again because I no longer have medical. For over a year I have been using free and clear detergent and rinsing my laundry twice. I have stopped using scented lotions and fabric softener. I moisturize twice a day with cetaphil. I’ve never been allergic to anything in my life and am hopeful that someone can help me figure out what is causing this. I’m a female in my early 30’s if that helps. Thank you!