the discomfort moves to your more tender regions... and the dramatically raised bars bring the grips closer to your shoulders.
you become cramped on top of the bike.

i've seen this too often.. the rider bought a 6" rise bar thinking it would help, and instead everything hurt more, plus a few new pains.

when pedaling, if you are too upright, your HIPS start rocking side to side more, this twists your lower back more... you also lose power and need to strain to gain forward motion.
if a frame is too long, then the rider tends to lock their elbows... this increases loading on your hands.
the trick is finding a happy medium via minor adjustments... IF the frame actually fits you..

there are several vids online showing basic bicycle fitting...
here's a pretty good one...ALL the factors relate to the others. Seat setback or a different (steeper or a different length) stem can change a lot, and are the most common adjustments after seat height.

there are many more vids.
they can SHOW what it would take hours to type out.

the single most common mistake is having the seat too low.
next is a seat too far back
next is the bars too high.
when things are right, riding becomes funner and easier.
watch a few vids.... each has strong and weak points.

and at 67, i too have some fresh pains to deal with, and a few old ones too.

set seat height, seat setback(knee over pedal at 3 o'clock position), unlock elbows, get the shoulders to relax...

and STRETCH OUT before a ride, ok? it seriously helps.