Dear customer,
It could be a insect bite and you should start the
oral antibiotics to prevent the secondary bacterial infection.The commonly used are
cephalexin,
augmentin,
ofloxacin, etc
The antihistamine drugs like avil, cetrizine may also be needed along with motrin, advil etc to control the symptoms.If the swelling is very much then steroid injection needed in some cases.
You should consult the doctor/ER for these prescription drugs
Thank you