This looks like a healthy stool, close to Bristol type 4, a smooth and soft log shape in a dark brown color. Since you have IBS and lactose intolerance, keep up your water intake, balance your fiber gradually, and choose lactose-free dairy to stay comfortable. Keep an eye on your gut patterns over time.

This is a Bristol type 2 stool (lumpy clumps) with a normal brown color. It looks slightly firm, which may suggest a tendency toward constipation, so increasing water and fiber intake may help. Since you have IBS, keeping regular meals and steady hydration will support your gut health.

This is a Bristol Type 3 stool (cracked sausage) with a normal brown color, which indicates generally healthy digestion. Since you have IBS and lactose intolerance, keep up your hydration and fiber routine, and note whether dairy triggers any changes in your stool.

This stool is Bristol type 3, a cracked sausage shape, with a normal brown color (C1). Overall it looks healthy. Given your IBS and lactose intolerance, increase fiber gradually, drink plenty of water, and try short daily walks to support gut motility.