 [ Symptoms ] my daughter told me she has some discomfort right before peeing she said when she wipes she also sees a little blood [ Disease ] two common reasons for three year olds to have a on going cough undiagnosed asthma and day care attendance if you have a family history of allergies or asthma asthma should be carefully investigated constant runny noses can trigger a cough as well if your child is in day care preschool or going to play groups she is constantly exposed this time of year to back to back viral infections this alone can mimic asthma and cause a chronic cough