Whilst I have no problem with 'piles' and was not hacking as the OP was. I was slim and athletic - used to walk 5 miles a day, do weight-training and cycling, etc. Then 6 years ago I moved in my chair in the office and had a feeling like an electric current travel up my spine. It was months before I could turn my head without pain, and in the following years I've suffered terrible back, pelvis, and hip pains, and it's getting worse. I cannot really sit upright, and now even have trouble walking. No doctor can explain how all this began or even if the various problems are connected - and even when they have some 'treatment' the odds are even as to whether it makes matters better or worse.
So please, if you value a normal life, take care of yourself and don't sit too long without breaks. It won't matter how much money you make if you can't enjoy an evening at the cinema or can't go for a walk when on holiday.