Try the advice the Buddha gave to Nakulapita:
I have heard that on one occasion the Blessed One was living among the Bhaggas at Crocodile Haunt in the Bhesakala Grove at the Deer Park. Then the householder Nakulapita went to the Blessed One and on arrival, having bowed down to him, sat to one side. As he was sitting there he said to the Blessed One, "Lord, I am a feeble old man, aged, advanced in years, having come to the last stage of life. I am afflicted in body & ailing with every moment. And it is only rarely that I get to see the Blessed One & the monks who nourish the heart. May the Blessed One teach me, may the Blessed One instruct me, for my long-term benefit & happiness."
"So it is, householder. So it is. The body is afflicted, weak, & encumbered. For who, looking after this body, would claim even a moment of true health, except through sheer foolishness? So you should train yourself: 'Even though I may be afflicted in body, my mind will be unafflicted
.' That is how you should train yourself."
Here's the whole sutta:http://www.accesstoinsight.org/tipitaka ... .than.html