Maybe he is worried you are trying to gay the boy up, or alternatively doesn't want him to play the guitar and focus on work, may not be a falang thing
Quite, he mentioned spasms which means daily back stretches would likely help but sounds like he'd prefer drugs, a quick fix, although drugs barely touch back pain
I haven't heard of anyone catching Syphilis in Pattaya, but likely to get much worse, no one tests for it and with no symptoms until it's too late it's not looking good. I test for it in Bangkok every 4 months