WhiteRabbit -If you wanna post the House it's transiting, I'll add info specific to Mars transiting that House, OK?
Here's more info to help understand more ...
"Transits of the Planet Mars:
Mars spends about two months in each natal house. Mars provides you with the energies needed to assert yourself in the pursuit of your needs and desires. Transiting Mars is retrograde for about three months each year. During that time you may experience reversals or delays in the affairs affected by Mars at that time."
AND
"Mars/Mars:
When Mars’ reactivates it’s own place in the natal chart, especially by conjunction, all of the natal potential of the planet is stimulated. A certain amount of energy will arise out of such a contact due to the awakening of the natural competitive urges. Especially in this instance the natal Mars should be examined for potential. Restraint and caution should be applied in regard to affairs ruled by Mars in the natal chart, but with assisting aspects, great accomplishments can be yours. With hard aspects to a natal Mars that is afflicted, matters could get out of hand and you could turn out to be your own worst enemy unless you can curb rebellious tendencies and maintain control. Open confrontations are common with this position and with many adverse aspects such conflicts might become physical, resulting in an accident. Since Mars reflects those of a masculine nature, conflicts with these types are the norm. This contact occasionally corresponds with an illness if other indicators concur."
AND
"... A strong Mars assists in affairs requiring courage, passion, and initiative, and if you have a strong Mars in your chart, you enjoy a healthy amount of competition and the opportunity to demonstrate your courage. You may be rather more competitive with standards you’ve set for yourself than competing with others and you do not wish to infringe on the rights of others as long as they give you the same amount of respect. Contrary to what might be expected, those people who are overly aggressive, combative, or competitive are not this way because of a strong Mars. Rather, this would come from an afflicted Mars, causing its energies to work inharmoniously.
A healthy natal Mars would be so by a good sign and house placement and also by smooth-flowing aspects to other planets in the chart. This would ensure the easy integration of one’s efforts with the rest of the world. Such an individual is able to withstand nearly any onslaught from Mars, whether retrograde or not. In many cases challenging aspects to a strong Mars correspond with noteworthy achievements and progress. Mars combined with the natal Sun, Venus, or Jupiter by a sextile or trine aspect would bring harmony to the expression of Mars’s energies. With any of these aspects you are able to exert your initiative in a manner that is not threatening to others..."
"... A weak Mars in the nativity could reveal itself by an over-compensating manner, causing inappropriate aggressive actions that bring problems back upon the individual. The “flight” option may also be in evidence with a weak Mars. Another likely manifestation with a weak or afflicted Mars is to experience the aggressive energies of Mars in projected form. In projected form, the individual is rather like a target for someone else’s aggressive qualities and in occasional instances could even become the victim of such. A twelfth house Mars with several adverse aspects is an example of a weakened Mars and one that would need to be monitored closely as it transits the chart.
Most of us have several factors influencing our natal Mars, some beneficial and some that could be detrimental to our actions. Capitalizing on the positive factors and using discipline and direction on the less desirable ensures that we are using Mars to its greatest potential.
Although the aspects made by transiting Mars to the natal planets will show whether individual efforts are supported or challenged, and by whom, the house position of Mars is important in determining the possible area of ramifications from its transit or retrograde motion. In the latter case, Mars will sometimes move back and forth through two houses. In such instances, it will have an effect in both areas, with the main emphasis associated with the house in which the most aspects are made or, without aspects, where it spends the most time..."