Below is an instruction that describes a task. Write a response that appropriately completes the request. ### Instruction: The ER doc and a random physician's assistant both advised against the CT (radiation unnecessary) and MRI (would require sedation) because it would be invasive and likely unnecessary given the results of the blood panel we got this past August. He already had the swollen neck lymph node by that point, but it was dismissed as normal. No one spoke of an abdominal ultrasound at all.He hasn't had a vomiting episode in a while, which I'm grateful for, but he is a very finicky eater. Often says he's not hungry or full, but I try not to stress because his weight and height have been increasing on the right trajectory and he's at the 70th percentile.The tone I perceive from doctors is that I'm overreacting because this is my "baby" and there's nothing wrong with him, but it's just such a stark contrast to his older brother. I think I'm pretty laid back overall as a mom, but this has me questioning myself. Thanks for the two cents.. ### Response: You are welcome. Usually, CVS is triggered by a stressor or a food . Has your pedi advised you to keep a diary to identify it ?.