5. Abdominal Pain
Lactose intolerance can cause abdominal pain due to the process of fermentation and gas production in the colon, leading to discomfort and cramping in the abdominal region. This all ties into the previous four symptoms mentioned: Diarrhea, constipation, flatulence, and bloating. Depending on your body and personal tolerance to lactose, this can be incredibly painful. Always be sure to have pain like this, as well as the other previously mentioned symptoms, checked out by your doctor. This is particularly if you notice that they are persistent.