This is a weak wu DM, having only 1 support from the month branch. Therefore, the metal, water and wood stars are not favourable for him.
The 2 zi's in the natal chart represents his kidneys. His problems should have started in the yi-you LP when the you started to destruct the 2 zi's. Upon entering the bing-xu LP, his useful god, bing was combined away by xin and transformed into water stars. This transformation also lured the shen-si in the natal chart to transform into water stars too and thus flooding the chart. A chart that is out of balance with a very strong negative star can bring about serious illness. The disappearance of his useful god, bing is the final blow.