Angarak dosha is formed when Rahu and Mars conjunct in any house in the kundali. This dosha gives its adverse and harmful effects when the position of Rahu and Mars is malefic in the natal chart.
Mars and Rahu both are malefic planets, therefore both of them meeting is itself a big dosha. In "angarak dosha", angarak denotes fire which is the nature of mars. Similarly the native suffer from heat and aggression.
When Rahu and Mars goes malefic, the following effects come as a result.