Final answer:
The patient should seek medical advice for severe heartburn and mention the use of doxycycline. Treatment may include lifestyle changes and medications.
Step-by-step explanation:
Based on the symptoms described, the patient is experiencing severe heartburn. Severe heartburn often requires medical management. It is important for the patient to seek medical advice to determine the cause of the heartburn and to receive appropriate treatment.
The patient should mention to the doctor that he is taking oral doxycycline for acne, as this medication can sometimes cause or worsen heartburn.
The doctor may recommend lifestyle changes, such as eating smaller meals and avoiding fatty foods, as well as medications to relieve symptoms and treat the underlying cause of the heartburn.