Welcome to Healthcare Magic Forum and thanks for your query.
Looks like you have developed a lesion of papular urticaria
Papular urticaria is a peculiar allergic response
characterized by a sudden onset of raised lesions on exposed areas of the body.
The disease is provoked by an insect bite mostly a mosquito bite.
You need to apply an antibiotic/steroid
combination cream over the lesion twice a day.
Take oral antihistamine like levocetrizine once a day to decrease the itching.
Do not use any moisturizer or oils till the time the lesion heals .
Hope it helps
Wishing you speedy recovery
Dr Geetika Paul