Thanks for your question on HCM.
Since your age is 84, there are high chances of
rib fracture. Because of
osteoporosis, flat bones like ribs are easy to fracture even with minimal pressure.
So we need to rule out rib fracture in your case.
Another possibilities in your case are
1. Pulmonary contusions.
2. Pneumothorax
3. Muscular
injury.
All of the above including rib fracture can cause deep pain.
So better to get done chest
x ray to rule out all these.
If chest x ray is normal, you should not worry much. You are having muscular injury only.
Better to follow these for better symptomatic relief.
1. Avoid heavy weight lifting and strenuous exercise.
2. Avoid bad postures in sleep.
3. Take good painkiller and
muscle relaxant.
4. Apply warm water pad on affected site.
5. Wear chest belt to avoid mobilisation of affected area.