Sigh. As many mosquito bites as I've had during my lifetime, I should be completely immune to them. Alas, that is not the case.
A few days ago, I swatted a mosquito that got in the house. Yes, inside the house. No, I don't live in a place where we normally need mosquito netting, but since then, I've thought about it, believe me.
Anyway, the mosquito escaped and took its revenge by nailing me on the first joint of the middle finger on my left hand. It started itching like crazy immediately and in an hour, my whole middle finger was so swollen I could hardly bend it, and the swelling was starting down into my hand.
I hit the urgent care clinic and the doctor looked at my finger and said, "Wow. Are you sure this was just a mosquito? Really? Seriously? Wow." A shot of Benadryl and six prednisone tablets later and I'm much better, but he said it was a good thing I came in. He said if the swelling had continued, I could have had compromised circulation in that finger, or cellulitis could have set in, which would have been too fun for words.
If you think you're having an unusual reaction, just go on to the doctor. Don't wait around, hoping it will get better. The consequences could be serious.