As you get older, you have all sorts of aches and pains.
I've got an ache in my lower back.
Since then, I have [had] a[n] ache in my left leg. (Preliminary English Test; B1; Turkish)
My head/tooth/back aches.
I ache/I'm aching all over.
After a[n] hour of horseback riding your muscles can really ache. (First Certificate in English; B2; Dutch)