Since I brought up the distinction here's how I perceive it.
Actual Pain is a serious Warning from one's body that injury has occurred (Yeoch!) or is occurring (Ow! Stop That Right Now!). Race crashes resulted in the clear cut Pain of a broken clavicle twice, that now bum shoulder will give a Warning pain of cease and desist that is unmistakable and best heeded.

Neither are the "aches and pains" which I perceive as the usual discomfort of re-adapting to the seat-time for long distances, putting out big power loads to get over grades on the fixed gear or HIIT full out efforts for speed work.

Discomfort is inevitable in long hard cycling efforts, Pain not so much.
Discomfort can be alleviated with the "right" saddle, a "proper" fit and the absolute necessity of putting in the seat-time it takes to physically and mentally adapt to cycling but is just part of the experience.

-Bandera