How do you say home sick in spanish?

"Hogar enfermo" is not a correct Spanish phrase. The correct way to say "homesick" in Spanish is "tener nostalgia de casa". This phrase literally translates to "have nostalgia for home". Nostomania or nostalgia (from Greek νόστος, nóstos, "homecoming"; and ἄλγος, álgos, "pain" or "ache") is a sentimental longing or wistful affection for the past, typically for a period or place with happy personal associations.