I had a discussion with someone who studies psychology recently and she was referring to mental stress as of what I thought being called physical stress. Namely while she was talking about mental stress she mentioned stressors and hormones. So my problem: Stress = tension Physical = referring to something tangible Mental = referring to the mind (notice not brain - not tangible) From the above, this is how I understand the two terms: Physical stress is the stress experienced by a human where physical things take place. For example talking to the girl you like, might result in stress hormones being produced in your body (physical things) which have the effect of high blood pulse (physical) and make you sweat (physical). Mental stress is the tension between two thoughts or some other abstract thing going in a person's mind. I can't really get my head around this one. So. My question is.. do you think the same? Am I wrong? Are semantics different in psychology, medicine, everyday life? Am I autistic or just stupid? What is the difference between mental and physical stress?