I have these exact symptoms. Use to be just a random itchy rash on my neck or face (I thought it was from mildew in our basement), it progressed to entire limbs itching (and of coarse swelling) in about 6 months. I have tried things in my own like probiotics, DIM, and Epsom salt bath. Then turned to the stinging nettle capsules, mixed herbal teas, and putting a dash of tumeric in food every day. I don’t get near as bad of outbreaks (maybe a red spot that I scratched here and there). I never linked the cramps and the bowl movements in the morning to it though – time to look up natural healing for my gut. Thank you!