What are the stool symptoms for lactose intolerance?

Yes, several: Gassiness, loose stools and non-bloody diarrhea are common symptoms of lactose intolerance. These symptoms can worsen as the amount of dairy product/milk is ingested. Similarly, the symptoms decrease with avoiding milk/dairy in the diet.

Gas and diarrhea: Lactose intolerance is the result of an inability to digest the sugar lactose. The consequence is excess gas, bloating, diarrhea, and abdominal discomfort or pain after eating a lactose containing food (milk, soft cheese, ice cream, whipped cream, etc).