If there is no planet in the 6th house, what does it imply in astrology?
Generally speaking no planets in 6th house means lower degree of debt, disease and enemies. 6th house is our prarabdh, our karmic debt and an empty house indicates lower debt to karma because simply the 6th house will be activated in fewer instances as there are no planets in it. Let’s say there were 4 planets in 6th, then 6th house gets activated every time dasha of one of the four planets starts.
In practice I have noticed that even extremely poor and downtrodden people will live an OK life if 6th is empty. Karmic debt is hardest to repay.