My dd 5 has recently had a upset tummy. Since then she had been in complete agony saying her bottom hurts. I don't know how to ease her pain. I've given her calpol but it hasn't worked. Typically the gp is closed now until Tuesday. I don't know what could be wrong with her. Her teacher did say there was a case of threadworms in her class. Could that be a symptom or could it be from going to the toilet frequently? It's not just sore she says its really painful even if she's just sat still she will scream out that she's in pain. How can I help her?