premise: Just to say that my sister is OK . She 's home now - they could n't find out what was causing her stomach pains and the high white blood cell count . She stayed overnight and for the next day and then they said she could go home and see how she went . If she continues to get the stomach pains we are going to take her back to the GP and see if he will refer her to a specialist or something . Went to Brighton today to meet Louisa . What 's a possible reason the writer 's sister is home now ?
hypothesis: Because she had stomach pains .