Tretinoin cream and itching?

I have been using tretinoin cream .025% on my face and neck for about 4 months now. I started using it every night about 2 months ago. My neck is incredibly itchy. It is not peeling or dry but the itching is constant. Is the itching normal or am I allergic to the cream? What is the best remedy to calm it? I don't want to decrease my usage since I think that will just prolong the problem. Suggestions?

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