I have a cousion who is pregnant this is her 3rd but she only carried one to term so far but with everyone she can't hold anything down not even water and she's always in the hospital because she's always sick what do you think the problem is?

It's called Hyperemesis Gravidarium. It's common with many women.

She needs to maintain contact with her OB. There are several medications that may help.

Hyperemisis is really hard, my mother had it w all 4 of her pregnancies. But she has only carried three of us to term because the last one made her so sick she would have died :( she now that I am pregnant suggest that 20 min before I get up I try to eat a little life cereal it is light but has a nice flavor to it. I hope it gets better for her. If I get any more advice on what helped my mom I'll let you no.