<s>[INST] i am 50 years old and a vein near my temple has just appeared, I do not have a headache and there is no pain but when i touch it, I can feel it pulsating, I have not been under any stress nor have I been taking part in any physical activity today. should I be worried? [/INST] HelloWelcome to Chat Doctor ! Your symptoms do not seem to indicate a serious medical disorder. Anxiety could contribute in the appearance of this vein. I would just recommend monitoring your blood pressure values. Anyway, if you start having headache, I would recommend consulting with a neurologist and performing a brain MRI and inflammation tests.  Hope you will find this answer helpful! Best wishes! </s>