"heavy pain" is a correct phrase and can be used in written English.
It is typically used to describe a strong or intense feeling of discomfort or physical distress. Example: The athlete fell hard on his knee, causing a heavy pain to shoot through his leg.
Heavy pain medications made him delirious.
He was also given heavy pain killers, after complaining of problems urinating.
I was on heavy pain medication, time passing in a blur of visitors and drugged sleep.
When we scrambled back onto the bank, gasping for air, our legs were heavy, pain shooting up the ankles.
In 1993, my 38-year-old son, Jon, was dying of liver cancer in a local hospital under heavy pain sedation, gasping for breath with open sightless eyes.
Why is this woman smiling and not hitting herself in the head with a lump of igneous rock that she found in a quarry to try to eclipse the dull, heavy pain of a program in which a woollen bikini is news?
The fire in my ass finally went out when I got on the heavier pain meds during my third week of radiation; I was in agony.
It is with great pain and heavy hearts that we share our memories of children who were not just victims of senseless violence, but also beautiful human beings who will never be forgotten by their teachers, peers, co-workers, students, friends or family.
The chronic and often highly painful condition affects a woman's reproductive organs and can result in heavy periods, pain and infertility.
Side effects include heavy bleeding, pain, infection and perforation of the uterine wall or bowel.
"Don't say, 'Nothing will change.'" But when the smile came, it was heavy with pain and exhaustion.
