If the Moon is not well placed, general bad health condition is indicated. Note the following:
a) Moon is debilitated or/and
b) Moon is in enemy's home or/and
c) Moon is lacking in paksha bal or/and
d) Moon is with with malefic planets before and after it.
Moon lacks the paksha bal by being close to Sun. It means that it must be as further from Sun as possible and possibly with a benefic planet. Moon has least paksha bal when it is the new moon day. As you will realize a healthy mind promotes healthy body and it has been endorsed by our elders since long time. And the moon indicates the mind. For a good/healthy mind, well, if you have been reading my blog, you know that your Moon must be strong and well placed. If not well, you can read the below posts for some help: