From last few days I am having a pressure under my collar bone. I don't know the reason behind it. I am guessing that it might be due to I have an acidity problem. Whenever I eat something in junk food, my acidity gets triggered. So, would that be a reason for it? Please help me. There is no severe chest pain at all. It's only pressure under collar bone. No pain in any other part of my body. I am scared. Is that related to any heart disease? The pressure lasts for a few minutes and then it goes away. It's not occurring repeatedly. Only one time in two days.