What causes red, swollen knees with horse fly bite?
Patient: hello I brought my 4yr old to the nature center and I had gotten a horse fly bite I noticed a bite behind his knee there is a red dot with swelling and redness across the back of his knee how can I tell if it is an allergic reaction or if it is something I should worry about and also what can I do to treat the affected area safely Doctor: Hello. I just read through your question. Generally, any reaction to a bug bite, big or small, can be considered an allergic reaction.  Redness and swelling to the area of a bite is expected. Cool compresses to the area typically help. They resolve on their own after a few days.