Unwanted Guests...

I don't know what it is but it seems like just when we get them to leave they come back again! They don't stay very long but they are very irritating & they bite! I guess I should say that it's regarding ANTS! And it's not black ants, they're red ants & they show up in my daughter's bed! Yep her bed! We can't figure out why it's only her bed. And sometimes it's her basket of clean clothes that she brings from the laundry room. I thought that it may be from the laundry room but since it's inside & I am usually in there a couple times a day for one reason or another, I haven't seen any in there. And if you have a teenager you know that they don't always put their clean clothes away immediately. Sometimes they just pick through it, searching for something to wear for a couple days! But back to the ants...they're usually found at night when she's going to sleep. She lays on her stomach & puts her arm under her pillow & "crunch", she's bitten! "Yowww! Mommmm!" We have to strip her bed linens & I shake them out & hang them on the line. I know that seems kind of lame but I haven't thought of anything else at the moment because it's usually at the worst time, she's going to bed late as it is & then who wants to deal with it at night when you're exhausted?! Does anyone have an ANT STORY to share?! Please do & meanwhile I'll research these little biters.