bed be sure to set the ac to recirculate and if its not hot outside you can keep it in filteronly mode allergists advise against living with an animal if youre allergic to it i always suggest people run after work in the late afternoon or evening she says your worst allergy mistakestitleyou get a hypoallergenic peturltextsorry folks but theres no such animal as a truly hypoallergenic pet your worst allergy mistakestitleyou sleep with your peturltextit may seem sweet to snooze with your pup or kitty at night but its not a great idea if you have allergies your worst allergy mistakestitle you leave windows openurltextmake it a rule to keep your windows closed and the air conditioner on when its pollen season this article originally appeared on healthcom you can become allergic to a pet and not know it because symptoms are subtle and chronic these medications almost all work better to prevent allergy symptoms than they do to treat them so people should not wait until theyre having symptoms to start taking their medicines says david rosenstreich md the director of the division of allergy and immunology at montefiore medical center in the bronx new york exercising when pollen counts are lower dr rosenstreich agrees can make an enormous difference