That episode was HOTbbbmom said:Do you mean the one where Thirteen hooks up for the night with the woman? Here's part of the recap:
House cuts an onion on Spencer's tray table, right beneath her face. Thirteen watches from the other side of the bed. Spencer's eyes are dry. She has no tears. House diagnoses her with Sjogren's, which attacks the glands that produce tears and saliva. It also causes lung cysts and RTA. Her lack of spit makes her mouth a breeding ground for a fungus like Candida. Thirteen's asthma inhaler wiped out her mouth's immune system as well. Spencer will live. House prescribes Methylprednisolone for the Sjogren's.