Do you have worms?

I went down to the Muslim part of town and met some of my friends. Over eating a really good bowl of noodles and chatting in Chinese... my friend was explaining to me that she sometimes gets sick when eating Chinese spice (lazi). Here its a very open and okay to talk about bathroom talk- and I was asking her if it hurt her stomach 'often...' and instead I had accidentally asked her "Do you have worms?" I had said the correct word 'often' in Chinese but said the wrong tone... and the look on her face when I asked.... Oh goodness! When we both realized what had happened.... we just started laughing! I love learning Chinese, and its fun along the way with my friends, as they continue to help me and laugh along the way with some of my language blunders.