mosquito bites do not cause high fever or hives. horsefly bites cause high fever and hives. if you get bitten by a mosquito it just leaves a little red itchy bump. horsefly bites are more serious. if you are bitten by a horsefly it leaves a huge red bump about 5-8 inches long. and about 3 days later the bump fades away but then you start to get one itchy bump on a part of your body and if you scratch you break out in the known reaction as hives. the best cure for hives is an oatmeal bath or milk of magnesia. and of course rest. i wish you all good luck and p. s. stay away form horseflies.
can mosquito bites give high fever and hives? . my 2 yrs old had woke up yesterday with a couple of bites and a fever. i took him to urgent care and they said that they were mosquito bites. he had intense fever all night and when he woke with this morning i notice his skin is rashy all over like if he had an allegic reaction or the high fever did it. is it possible that the bites gave him an allergic reaction or maybe it was just the high fever that made his skin like this please advice.