Welcome to HCM
Yes the cream that was used by you for your basal cell carcinoma
might have some allergic manifestation. Yes ofcourse it has the treatment. In homeopathy
the allergic reaction
can be neutralised by proper medication. But it is required more detail symptoms about the nature of itching like which parts are itching and is there any eruption with itching or no erruption. If there is any erruption then it is like small acne types eruption or like bee sting
). Is there any liquid like things oozing from the part you itch or dry in nature. after itching is there any burning sensation? does the itching is worse in warmth ? does the itching is worse in night time? does the itching is worse in any specific condition? etc etc . so there needs a detail elaborate symptoms.
If you want to consult with me then can contact us here in homeopathy section.