Does mark Harmon have arthritis

Answer 1

As an MD it’s easy to tell that Mark Harmon has significant Arthritis in both hands.

Swollen finger joints and ulnar deviated fingers.

Shows in every pic since 2017. It’s why he wears very long sleeves.

Absolutely common part of ageing.

Answer 2

As of August 2013, it has not been confirmed by Mark Harmon or his publicist, as to whether or not he has arthritis.