Hadn't gone to the doctor for 7 years (age 50-57). Had a stroke at age 57. Now 4 years later, I go yo my GP, cardiologist , nephrologist, and neurologist twice a year. Lots off stuff can I have no outward symptoms which tests can find.
My nephrologist checks my creatinine level which is a sign of kidney damage if it goes up too high. You don't have any major symptoms until it is pretty high. When I had my stroke, they said I had about a month before my kidney failed (I only have one since I had the other remove when I was 4 in 1961). I'm ok now.
A friend had a routine PSA test (had no symptoms at all. The # was through the roof. He had to have his prostate removed at Roswell it was full of cancer. He is fine now.
Get a checkup to head off any future problems.