 [ Symptoms ] is feet swelling a side effect of bactrim use i just finished my 2nd round of bactrim on my first round my two on my right foot were turning dark purple under the skin his diagnosis was that i had cellulitis one foot was cool to the touch and the other was very warm he prescribed a 10 day regimen of bactrim to be taken orally twice a day after the first round it seemed that the bactrim had done the trick and that it had worked not so about a week later the same foot was swollen again not sure what to make of it [ Disease ] if a child has a documented fever do not promote more heating by piling on blankets instead use a cool washcloth to the forehead or back of the neck however do not overdo that either you do not want your child to become so cool he or she is shivering not all fevers need to be treated sometimes they will get better on their own a fever over 103 degrees fahrenheit in a toddler deserves medical attention according to the american academy of pediatrics i hope your little one feels better soon