I hate giving advice, because I don't really feel qualified, but I can tell you what I know from my own experience.
I have almost the same condition. In the cold months, whenever I start to warm up at all (exercise, hot shower, exerting myself, eating hot soup, etc.), I start to get a wave of an unbearable, burning, tingling itching all over my body. I don't get hives, but I get so itchy that I when I scratch myself my body turns beat red and swollen all over. I can't even over-exaggerate how bad the itching is. It's mostly on my head, trunk, and legs.
From what I've learned about it, it's called cholinergic (heat-reflex) urticaria. It can be triggered by any kind of heat, and it supposedly can be caused by many different things. Stress, food allergies (and additives), and low thyroid function seem to be the most common. I seem to have all of these problems, so there you go.
I've been taking quercitin the last few weeks, and I do seem to be having some minimal improvement. I'd ask Dr. D'Adamo about it though before you started taking it.
I don't know why you'd be having this mainly around the fat areas. Maybe you have something totally different, but I think most hive situations have a lot of the same causes (barring a serious illness or a drug reaction), so I'd look into literature on hive causes and treatments.
Hope this helped!