Mars Placement in the first house of chart
The planet mars represents courage, strength and action. As we know that the 1st house represents self and personality. So, when Mars is placed in the first house the person is likely to be physically strong and courageous. First house also refers to temperament of the individual so such a person should guard their personality against Martian aggression and impulse. Native is likely to exude a lot of enthusiasm and positivity even in critical situations. Indulgence in sports and physically strenuous activities is also possible. 

The existence of mars in the first house can give the person a bruised ego, aggression, over-confidence and dominating attitude. The strong need that is there to learn to keep oneself balanced with this position of Mars. The position of Mars also gives injuries and burns to head. Native may also become impatient at times. Nevertheless, they tend to have strong leadership qualities. Such a person likes to be his or her own boss than follow orders. Recklessness however shall be avoided as it could lead to accidents too.

These natives get hurt easily which may make their attitude aggressive creating further problems in life. The negative thoughts will attract him and may force him towards negativity. In such circumstances, he would not hesitate to adopt corrupt or immoral path in retaliation.

The presence of Mars in first house makes him Manglik. He may face problems in his marital life. Spouse of such person should also be Manglik so that this dosha is cancelled and nullified to some extent.This positive aspect of such Mars can be fully availed if such a person has good level of confidence and determination to achieve desired goal or success in life due to his own efforts.

There are also some cures for mars in the first house:

1) Don’t lie and always be truthful.
2) Avoid company of saints.
3) Avoid using items made of ivory.

As a conclusion we can say that you are fierce and aggressive. The same time, you are active and dynamic. Basic point is, you need to reign in your energy and use it positively, constructively, and productively. Besides, you need to be more organized and planned for your activities. If you work in an unorganized manner, you are unlikely to make the desired success. But if you work with proper planning, you can go places.