My response to that would be to go see a good massage therapist, quicksmart! The worthwhile (for this purpose) ones describe themselves as performing 'Sports Massage' or the more technically correct term of 'Myotherapy'.
More often than not aches, pains and spasms of this sort result from us sitting or lying in unusual positions, getting tendons and such out of place and/or nerves pinched, muscles knotted up and such. Soft tissue injuries and inconveniences, in other words. Any half-decent myotherapist will sort that stuff out for you, and will refer you on to more specialised treatment if the injury or condition appears to be anything more serious.
If the treatment doesn't hurt a wee bit it's not likely to be doing any good, but don't be silly in the stoicism. Let the therapist know if it's too uncomfortable for you.
I used those services quite a bit during the latter years of my hard, fast and heavy work in sawmills, and then again recently when, during preparation for a softball finals series I found myself unable to bend or even walk comfortably. (Turned out I'd put some stuff out of place in the lower back/buttocks/upper leg area which saw me twisted up a bit and with one leg sitting an inch or so higher than the other.)
The worst 'specialist' to see straight up, in my opinion, is your G.P. The medical profession is still too 'dark ages' with respect to this sort of stuff, and medical practitioners too often seem unable/unwilling to refer you to someone who can help. You're more likely to have them prescribe you paracetanol and rest, which doesn't really do diddley-squat.