As for problems I think there is not anything I can say about specific problems;--  and in fact when the reason for a problem is unknown and not well understood, it is always best to do nothing. The reason is the as long as the source of any problem is unknown, almost anything one does to improve the situation is almost guaranteed to make things worse. George Washington was sick and the doctors advised blood letting.They did it so much that they certainly caused his death. So when actual mechanisms are not understood then doing nothing is always better than "something must be done." [Something must be done almost always amounts to walking into a pharmacy and just picking out any medicine on the shelf on the assumption that everything there is healthy.  ]

On the other hand there are things one should  do as general aspects of healthy living. Learning the Old Testament and the Avi Ezri of Rav Shach. Also Learning Physics and Math and talking with God when one is  outside walking and trying to get exercise and eating healthy.