What could be the reason for coughing and vomiting together?

Coughing and vomiting together can occur due to severe coughing fits. In children, asthma can cause this, as noted in a study where posttussive emesis, or vomiting after coughing, was identified as a symptom (Reference 1). This happens because the coughing is so strong that it triggers the vomiting reflex.

Another condition that can cause coughing and vomiting is whooping cough, or pertussis. In both children and adults, whooping cough is known for causing intense coughing spells that can lead to vomiting (References 2 and 3). These coughing fits are often very severe and can make it hard to breathe, leading to vomiting as the body tries to clear the airway.

Both asthma and whooping cough can cause significant discomfort and require medical attention to manage symptoms effectively. If someone is experiencing these symptoms, it is important to consult a healthcare provider for proper diagnosis and treatment.