I mentioned about baby having diarrhea earlier but when should I worry about it? It started Friday afternoon. He's had 6 dirty nappies today, 3 in the last hour but the last couple were only small amounts. He seems totally fine in himself, drinking milk like usual, playing and napping fine. His nappies are less wet so we are trying to give him water as well as his milk. Is it worth ringing the GP tomorrow if it continues? I've got no clue what has caused it and it's the first time he's been like this. He's 7 months old.