I have a sensation deep in my chest. To the left of my sternum. Near the top side of my heart. It occurs with intensity 2 or 3 times at night , lying down only. It feels like paresthesia. It only lasts 1 minute. It starts lightly then intensifies and fades. Uncomfortable but not painful. I think is could be back flow?, pressure? From my lymphatic system/thoracic duct? About 1% of the time it occurs in my diaphragm area. But never as strong as by my heart area. My heart is good. I have a very slow rate 45m. I have this tingling for 6 yrs. I m 56, female. Recent PTX, no change with surgery. Thyroid good with left side 2 cm nodule. Ganglion Cysts in left arm. All vitals good. The tingling is mysterious and bugs me. Best regards, lisa