From your desription , it looks like you have developed lesions of Vector dermatitis, also known as Paederus dermatitis
The disease is provoked by an insect belonging to the genus Paederus. It is a type of irritant dermatitis
that develops after insect 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 swelling.
Clean and disinfect all your bedding and clothing. Consult a dermatologist
if the lesions persist or increase.
Hope it helps
Wishing you speedy recovery
Dr Geetika Paul