Around 2 percent of people have what
Around 2 percent of people have what's known as mirror-touch synesthesia.

Mirror-Touch Synesthesia, The Condition That (Literally) Makes You Feel Others' Pain

Interoception: the hidden sense that shapes wellbeing, Science

Mirror Touch Synesthesia: Is It a Real Thing? Experts Investigate the Rare Condition of Feeling Other People's Sensation

People With This Condition Literally Feel What Others Are Feeling

Here's the Science: Helping Others Is the Key to Happiness

A Nurse with Mirror-Touch Synesthesia Can Literally Feel Your Pain

Are You Plagued by the Feeling That Everyone Used to Be Nicer? - The Atlantic

Science and Technology

How Anxiety Causes Sensations in the Fingers

Some people with synaesthesia feel other people's sensations of touch – painful and pleasurable