I've had cholinergic urticaria for about 7 years. I don't have it anymore, it just went away by itself. Anyway, what I found to greatly relieve the symptoms (itching, etc) is to break a sweat regularly, best by some aerobic exercise. You see, because urticaria is caused by an increased release of histamines, if you avoid the itching by avoiding getting hot (say, for days), histamines will pile up in your body, and then next time you do get hot, they will all be released at once, and you will have a huge swelling, itching, etc. I once almost fainted from the itching/pain when I went to the store after several days of staying indoors. But, if you push it every day, then every time you do it, you will have smaller itching, but you will also force histamines to be released, thus preventing them from accumulating in bigger amount, so if you have to do something in the sun or in some hot space, the symptoms will be much easier on you. This really helped me and once I started doing it, I was able to do stuff normally, and even though I did get the itching, it was completely mild and tolerable and didn't prevent me from doing stuff as before (like having sex, for example).