Mercury rules 12th and 3rd house is in 6th house in Sagittarius

Mercury, being the planet of intellect and communication, in the 6th house of health and service, suggests that you have a sharp mind and excellent communication skills, which can be used effectively in your professional life. You may enjoy research work, data analysis, and critical thinking.

Since Sagittarius is a sign of higher learning, foreign travel, and spirituality, this placement of Mercury may indicate that you have a strong inclination towards these areas.

On the negative side, there may be a tendency to overanalyze and become overly critical at times, which can induce stress and anxiety. Hence, it is crucial to maintain a balance between rational thinking and emotional well-being.

Overall, this placement suggests that you have the potential to achieve success with your skills of analysis and communication, especially in the service sector. It is important to utilize these abilities wisely and with empathy towards others.