You physically feel pain in the same area when a person; describes what it feels like, talks about it excessively, tells you how they got the pain or just (in rare cases) are around you.

Got the covid-19 vaccine

a big pain you have when your spouse is having the same pain at the same time.

When someone you love is in pain and you are in pain because you love them so much. In other words, When the person you love..(your sould mate)..Is in pain..and you are in the same type of pain because you have sympathy for them.

When a guy sees or hears of another man taking significant damage to the crotch, and crosses his legs because the mere thought of such pain makes his genitals feel either vulnerable or uncomfortable.

A kind of phantom pain experienced by someone watching a dude getting nailed in the junk.