https://www.healthcentral.com/article/discomfort-upper-left-chest-no-pain-just-discomfort-methadone-years-seems-aggrivate-it-doc-heartburn-indigestion-what-think
GERD

I Have Discomfort In My Upper Left Chest. No Pain. Just Discomfort. I Have Been On Methadone For 4 Years And It Seems To Aggrivate It. Doc Said Heartburn/indigestion. What Do You Think

    Answered by Stephanie
    You should know: The answer above provides general health information that is not intended to replace medical advice or treatment recommendations from a qualified healthcare professional.