<s>[INST] I HAVE A VEIN ON THE LEFT SIDE OF MY CHEST THAT IS VISIBLE AND IS SORE. I JUST HAD A STRESS TEST DONE AND EVERYTHING IS NORMAL WITH MY HEASRT. THE AREA IS VERY SORE TO THE TOUCH. I ALSO HAVE BEEN HAVING FLUTTERING SPASMS JUST UNDER THE LEFT BREAST AREA. I AM A 53 YEAR OLD MALE. [/INST] Thanks for your question on Chat Doctor. I can understand your situation and problem. No need to worry about heart diseases because your stress test is normal. Possibility of skin infection like herpes zoster is more in your case. It is viral infection of skin caused by skin contact. It is commonly seen in chest area. Herpes causes pain, redness, itching and venous engorgement (dilatation of veins) in localized chest area. So better to consult dermatologist and get done clinical examination of your local part. You may need antiviral, painkiller and anti-inflammatory Chat Doctor.  Hope I have solved your query. Wish you good health. </s>