Hello, yes it is possible it could be a
bite. It could also be GOUT which generally starts in the big toe, or
cellulitis which is inflammation of the cells in a particular area. You probably need to get it checked because treatment is available to help decrease the swelling and pain, and all the conditions can be very painful. Prolonged swelling in an area can also cause decreased circulation making additional problems for you to have to deal with. I Hope This Helps!