The lord of your 6th — the house of rivals, debts and illness — stands in a difficult house (the 6th, 8th or 12th): Harsha yoga, one of the three Viparita Raja yogas, where one trouble cancels another. In the 6th lord's dasha it gives a strong constitution, victory over opponents, friends in high places, wealth, a good name and a clean conscience. You tend to win the fights you did not pick.
