Final answer:
An adolescent with upper chest pain and a history of doxycycline use for acne should prompt consideration of esophageal problem. One potential esophageal problem that may cause upper chest pain in this case is esophagitis.
Step-by-step explanation:
An adolescent with upper chest pain and a history of doxycycline use for acne should prompt consideration of esophageal problem. One potential esophageal problem that may cause upper chest pain in this case is esophagitis. Esophagitis is an inflammation of the esophagus that can be caused by the use of certain medications, including doxycycline. It can present with symptoms such as chest pain, difficulty swallowing, and heartburn.