In a dream yesterday, I held hands with a long-past lover in school and felt the warmth of her hand on mine. Upon awakening, that wrist was painful. Now, this discomfort might have derived not from the dream but from having pulled too heavy a load in a cart that day or holding a tablet for too long while watching a movie. Which got me thinking.
Some people dream in color but for me this occurred only once and then momentarily. A coworker of years ago suffered nightmares from which she awoke screaming several times a week, then bearing marks on her wrist where, in the dream, her mother held her down while sexually abusing her. She had experienced this during childhood.
Dream content has inspired art and presented the solution to scientific problems. "There are more things in heaven and earth, Horatio, Than are dreamt of in your philosophy." (Shakespeare/Hamlet)