Hello. Thank you for asking on HCM. I read your query and understand your concern. Now, the description of the heartburn you provided, is with highest probability from the stomach, as the origin. This symptom is called pyrosis, and is produced when the highly acid content of the stomach is returned to oesophagus or, sometimes, throat and mouth. This can happen from various reasons, mostly from a disbalance between acid-producing and acid-inhibiting factors in the stomach and from the lower oesophageal sphincter insufficiency. Without digging further more into theoretical details, I would suggest you to refrain from certain food and beverages that favour acid production and/or inhibit acid-inhibiting factors and/or lower the pressure of the lower oesophageal sphincter: - alcohol and tobacco - chocolate - tea, coffee (xanthyne derivatives) - spicy and grilled food, and pickles I would also recommend you to start a course with a proton pump inhibitor (PPI): omeprazole 20 mg x 2 tb/d for the first two weeks, then 20 mg x 1 tb/d for four other weeks, and accompanied with domperidone x 3 tb/d. Also, you should not lie down, but sit up or stand, for at least 90 minutes after you have had your last meal. If the symptom persists after all these measures are undertaken, I would recommend a upper gastro-intestinal (GI) endoscopy, for further investigation. I hope I was helpful with my answer. Best regards.