I take it she's not on her period?
Blood in urine can mean many different things, ranging from the food she's been eating (has she had beetroot?) to something which will need medical attention (like an infection for example)
Is there a lot of blood? Is it dark red/bright red? Any pains anywhere? Any chance she could have contracted an STD such as Chlamydia?
Your girlfriend will need to see a doctor because as you can see, the list is endless as to what it could be.
She will need to go asap, because she may need treatment.
Let me know how everything goes in feedback - I hope she's okay soon. :) [ thelaura's advice column | Ask thelaura A Question ]
Attention: NOTHING on this site may be reproduced in any fashion whatsoever without explicit consent (in writing) of the owner of said material, unless otherwise stated on the page where the content originated. Search engines are free to index and cache our content. Users who post their account names or personal information in their questions have no expectation of privacy beyond that point for anything they disclose. Questions are otherwise considered anonymous to the general public.