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2020 campaign is leaving its mark — on Bernie Sanders' head.

The Democratic presidential candidate and Vermont independent senator cut his head on the edge of a shower door, his campaign said on Friday, and visited a walk-in clinic as a "precaution."

He was given seven stitches and an otherwise clean bill of health.

"The senator has proceeded with all of his scheduled events," the campaign said in a statement.

Sanders, who was a Democratic contender in 2016 before running again for the 2020 nomination, is 77.