Longlasting itching/tingling (especialy on heat)

Hi, I am 33 years old and since February I am experiencing itch/tingling attacks on a daily basis. It normally starts before noon and lasts 3 or 4 ours, it rarely occurs in the evening and never during the night. The itch starts on the face and sometimes continues to the hair and upper body region. There are no visible signs on the skin. Creams don't help, dermatologist said it is not a skin problem. Did blood tests, found slightly evelavated thyroid's TSH - 6 with normal T3, T4 and antibodies).

The itch also starts when my body heats up (short walk on the sun), exercise, sit into warm car, ..., mental activity ... Cooling with cold water helps . My current thinking is that the problem is in peripheral nerves. I also did head MR for MS and Lym boreliosis test, which were negative. I had no zoster signs in the past. Sinus problems (polyps) were found through MR, had operation in may, with no effect on the itching. In the last month, I am experiencing slight pain in knees, even after 20 min walks (2 monts ago I would easily run 10+ km). Since February, I additionally experienced Raynaulds phenomenom on my left finger for three times, which never happened before that. Pressing the tips on my fingers and feet sometimes triggers slight pain, like being stinged with a needle.

Quality of life is realy low at the moment since I am not even able to go out during the day, exercise is not possible, and even withthout that I still spend 3 or more ours a day scratching and cooling with cold water, not being able to do anything else, like my job.

Does anybody have a clue what might that be?

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