Ask the experts
I have tendonitis (trigger finger also) in my hands. It seems to worsen after eating red meats. What's the connection?
There is no direct relationship between eating red meat and inflammation of tendons or tendonitis (also spelled tendinitis).
An indirect relationship might occur, especially if extra salt is eaten with the meat. If inflammation is present in a tendon, the salt associated with eating meat potentially can cause water retention that could lead to further swelling around the involved tendons that could make the tendonitis appear worse. The area around the tendon then would seem more stiff and swollen.
"Trigger finger (stenosing flexor tenosynovitis)"