Dr. Duffy says asthma, reflux, post-nasal drip, and drugs like ACE inhibitors for blood pressure, cause the most coughs. GERD, or reflux, can cause coughing, although coughing can also cause GERD.

Children and adolescents with documented postacute COVID-19 syndrome experienced increased risk for gastrointestinal symptoms and disorders, according to a study published in JAMA Open Network.