Skin cancer can be from a number of contributing factors and yes working in the PH is hard on foreigners.
I am dealing with, liver failure but still working. Lung cancer, mostly fixed. Many skin cancers, removed and some still here. Systemic cancer in the lymph system. Bell's Palsy which is in fact a viral infection of the nerve sheaths. Had a massive heart attack that took most of a year to recover from. On the good side, one bullet hole and two years ago was bit by a cobra.
Send me a PM and I will show you how to deal with the cancer, few doctors know how to really fix it. Buck up and laugh at it ! ! You could be me.
I've been technical help on some dig there, who and where not important. But to say, this year two of them dropped dead from poison gas when breaking through a bulkhead. One survived but is permanently damaged lungs.
TH is seriously dangerous business but once in your blood near impossible to walk away from.
Z