My Husband (age 44) Is Having Shooting Pains Intermittently In

My husband (age 44) is having shooting pains intermittently in various parts of his body/joints. This started after exercising on total gym a few days ago. He has a history of lyme disease. He also has a history of stomach cancer four years ago, which he is cured from. Just two days ago, he saw his oncologist for a follow up CT scan and blood results, and everything was normal.