Does a bee sting cause bruising? My 10 yr old was stung Monday while walking through the grass. She swears it was a Bee. She took leaves and brushed the insect who was still attached to her leg off with the leaf and cane in to see me. I looked and could not find a stinger. Her ankle immediately swelled around the bite site. The next day after school, I was alarmed at the amount of swelling and noticed a bruise forming in her ankle where the bee stung her. I put a cold compress on it and a mixture of baking soda and water to ease the itching and pain. This seemed to help. She has continued to complain about itching and pain ... I just looked at it and the bruising is now a dark purple, extending from the bite site to the bottom of her foot