thanks for choosing health care magic.
It seems like an insect bite . you can take an anti histaminic to reduce your itchy sensation
Tab . Cetrizine
can be taken . It can cause mild sedation hence avoid driving or operating machinery.
Take a paracetamol
500 mg to reduce pain .
You can apply topical calamine
lotion as it has a soothing effect .
It should reduce with the above medication if it does not then contact your doctor to rule out other causes