Sun rules 4th house is in 6th house in Libra

When the Sun is placed in the 6th house in the sign of Libra in a person's birth chart, it can have both positive and negative effects on various aspects of their life.

On the positive side, the placement of the Sun in the 6th house indicates that the person may possess a strong willpower, perseverance, and the ability to overcome obstacles in their life. They may have a powerful drive to achieve their goals and work hard towards achieving them. This placement also suggests that the person may have a strong sense of morality, and may stand up for justice and fairness in all areas of their life.

On the negative side, this placement of the Sun can make the person prone to health issues related to the stomach and digestive system, especially if there are negative aspects to the Sun from other planets in the chart. The person may also find themselves working in jobs or environments that can be stressful and demanding, leading to physical and emotional exhaustion. This placement can also create conflicts in the person's personal and professional relationships if they become too critical or opinionated.

Overall, the impact of the Sun in the 6th house in the sign of Libra on a person's life would depend on various other factors and aspects present in their birth chart, as well as the current planetary transits and dasha periods they are experiencing. As a jyotish astrologer, I would need to analyze these factors and provide a detailed reading to accurately predict the effects of this placement on the individual's life.