If you suspect you have a lactose intolerance, you can take a lactose intolerance test to confirm it. The procedure typically involves consuming products containing lactose and monitoring for symptoms. Common symptoms of lactose intolerance include bloating, stomach pain, and diarrhea. If symptoms occur after consuming lactose-containing products but not when avoiding them, it's likely you are lactose intolerant. In such cases, you can avoid lactose-containing products or use over-the-counter lactase tablets to help digest lactose.