Mars in the sixth house can give determination to tackle demanding work, competition and opposition. When Mars and Lagna lord are strong, the native can sustain an active response to obstacles. Under affliction, the same readiness to fight can prolong disputes or turn routine demands into repeated conflict.
The sixth’s disease, debt and opponent meanings appear in Brihat Parashara Hora Shastra. Its upachaya character can favor effort, but a strong sixth-house structure also makes its demands prominent. Compare it with Lagna and Lagna lord before deciding who has the stronger position. Jupiter in the sixth brings a more advisory response.
Capacity to contest and capacity to win
For a dispute, read Mars’s sign and dispositor, the sixth lord, relevant opposing factors and the periods activating them. A strong Mars supplies persistence and force; favorable realization needs the rest of that mechanism. The judgment weakens if Mars repeatedly afflicts its own supports or the resource houses cannot sustain the contest.
Mars’s aspects reach the ninth, twelfth and first. Guidance can channel the effort, expenditure can sustain or drain it, and Lagna shows what the native carries personally. Their lords distinguish constructive resistance from an exhausting struggle.
Mars in Cancer adds debilitation; proximity to the Sun adds a separate combustion condition. A health-related interpretation needs repeated Lagna, sixth-house and relevant karaka indications; neither condition is a diagnosis.