Twice now about a week apart my 4.5 son has said “my heart is better now” and second time “my heart is better, it’s not bumpy anymore”. First time he was just in our house and his aunt/uncle & older cousins were round. I think his uncle was having a little bit of horseplay with him but nothing too strenuous. The second time was when my husband picked him up from After Schools club so we don’t know if he was exercising or what (he was a little sweaty but he’s a redhead so he’s always sweaty in summer!). Is this just him becoming aware of his heart beating faster or a real cause for concern? He is otherwise totally normal, just maybe a bit tired but has just started school & BB for the first time.