[Eagle5US]

are goofy...idiopathic urticaria (itchy reactions that we don't know where they came from or why) are especially difficult.

In very few cases are soaps or detergents the culprit. Many times humans have chemical releases of histamine to factors that are just unknown to us.

I would suggest that you first begin a diary. Once you begin having symptoms, track them and their severity along with any meds you take and the time between dosing and viable change in your condition.
From the onset of your symptoms, backwards plan your day for about 6 hours, then scoot all the way back to 18 hours. The histamine cycle is "bi phasic", meaning that after the primary reaction is over with, there is a secondary "wave" in 16-20 hours. Most people are on suppressives by this point or the meds they previously took have a half life that is LONGER than the cycle.
Compare your event diaries for any similarities, common foods, times during your monthly cycle as they coorellate to severity, particular habits you may have, any medications you are currently taking...to include if you have recently switched from generic to brand name or vice versa. Often times the difference between the two is the preservative or "Dye color number"

Hot showers will increase the reactivity of histamine release, while some people are dermatographic with an ice cube (I could give a guy at Know hives in a tic tac toe pattern by drawing it with an ice cube on his back) Benedry is the common and well known choice, there are many others that are available without such drowsy side effects. Talk to your family doctor about these options (even H2 blockers such as Zantac). Though this gives few answers...perhaps it wil give you a couple more options.

Though taking meds for the rest of your life is unattractive at this point, but I would consider it the lesser of the two evils as compared to the urticaria. ...my sincere best to you, and good luck!!!

The Eagle