Could it be an insect bite?

Dear Ask The Doctor: I have been bitten by something.the area s swollen but their is no bite marks.The bitten area is red and has a circle.what could it be.it is itcy though.the redness of the bit is increasing.

Dear Vanessa: It is difficult for me to say what could have cause your symptoms. I would advice you to consult your GP immediately for a more indepth examination. Take care.