 [ Symptoms ] can having a sonohysterogram introduce herpes to your uterus  i take acyclovir 2x daily and have had herpes for 9 years i had the sonohysterogram recently and although i was not having an outbreak i could have been having a prodrome i am not sure i am afraid it could be in my uterus now and could infect a baby if i get pregnant [ Disease ] you did not mention if his foot was swollen and or has any red lines in the area it could be as simple thing as gout which is very painful and common for his age he would need further test to find the root of the problem