To dream of pinching someone represents intentionally making a situation uncomfortable or frustrating. An assertive reminder.
To dream of being pinched represents a person or situation that you feel is a nuisance or demanding your attention in an uncomfortable manner. An uncomfortable reminder of the reality of a situation.
To dream of pinching yourself may reflect your attempt to test yourself with realistic or objective beliefs. Feeling that something happening to you may be too easy, too unrealistic, or too good to be true. Using a challenge or difficulty to make sure mentally grounded.
To dream of pinching an object represents an attempt to test how sensitive a person or situation is.