### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Hi! I am a fifteen year old female athlete, I play basketball year round and am in very good shape. I first started experiencing these symptoms when I was ten years old during a basketball game, as I got older they began to happen more frequently. The symptoms occur nearly every game yet the severity varies, the more severe it is depends on the intensity of the game and how much I play. Most common symptoms are: -headache -upper stomach pain -hard time focusing In more severe episodes I also experience: -tightness of chest -nausea -achy all over The day after an episode i feel: -fatigued (even after much sleep) -headaches -achy (particularly kidney area) -sometimes nausea Severity of the episode determines severity of day after symptoms. Daily symptoms: -fatigue -hard time falling asleep -aches (kidney area) I have been to a cardiologist who had an ultra sound, EKG, and stress test and which only detected an irregular heartbeat, premature beats. I also have very low blood pressure. Before games I hydrate very well, drink Gatorade during games, and this year I tried eating a power bar before the game which did not help. Please help!

### output:

Hello! Thank you for asking on Chat Doctor! I understand your concern. Your symptoms seem not to be related to any cardiac disorder. Anxiety can be the cause of all your problems. I would like to explain that anxiety can cause an increase in the plasma levels of catecholamines, which can cause cardiac arrhythmia, gastrointestinal symptoms (an irritated bowel syn Chat Doctor. The fact that these symptoms occur during games is indicative for this diagnosis. I would recommend you to consult with your GP for a careful physical examination and perform a complete check-up (routine blood test, kidney and liver function tests, blood electrolytes, thyroid hormone levels, chest x-ray), to exclude other possible causes of these symptoms. Hope to have been helpful! An anxiolytic 