Mangal dosha or Manglik  : 

According to Indian Vedic astrology when Mangal or Planet Mars is situated in 1st,2nd , 4th , 7th , 8th , and 12th ,from the Moon, Venus and the seventh lord in Kundali or Moon chart called Mangal dosh or kuja dosh(angakara dosh) in Kundali or called a Manglik person Or when Mars is placed in the 1st ,2nd , 4th ,7th , 8th , 12th , house from the Birth Lagna occure a Mangal dosh . In general practice Mangal dosha is considered from the Lagna and the Moon.
The Mangal or Planet Mars is the one of the Planet in Navgraha planets its represents power ,strength, courage, aggressiveness,self Confidence, and ruled over the sign Mesha or Aries and Vrishchika or Scorpio.
When Mangal dosh falls in a person’s kuldali to be harmful for marriage resulting in distress and separation or divorce, tension in relationship, and even unfortunately death of one spouse due to Mangal dosh. But when both spouses or husband and wife are manglik the Mangal dosh will neutral or cancelled itself and negative effects are cancelled in their Kundali or birth chart. And they live Happily marriage life mutually.

Some Astrological remedies for Manglik dosh or Kuja dosh are given below :
1.Mutual marriage : When both person groom and bride are Manglik then the Mangal dosh will be neutral or cancelled . and mangal dosh is not effected for both groom and bride and they enjoy happily marriage life.
2.Kumbh Vivah : According to Indian Hindu Vedic astrology When Manglik person marry with a Peepal tree, Banana tree or Metal idol of Lord Vishnu then he or she resolved or negate or cancel their Manglik dosh.
3.Position of Mangal or Mars planet in horoscope or birth chart : According to many astrologers if Aries or mesh is in the first house in horoscope and when mars or mangal is in Aries or mesh then mangal dosh or kuja dosh is not effective as aries is in the own house or Mars or Mangal.
4.Old age marriage and offering the Charity : According to many astrologers a person who effected from Mangal dosh must be marry after age of 25 years.Some effects are weak after 25 years age in birth chart . Offerings to the charity on Tuesdays are also a good remedy to get rid of Kuja Dosha. Some of the objects that can be donated to appease Kujan are red silks, knives or swords, foods made out of red dhal and red stones including corals.
5.Fasting of Mangal dev : Fasting on Tuesday is one of the remedies to appease Mangal or Mars. A person who observe the fast on Tuesday consume or use toor dal on that day.And chanting the Mangal Mantra or Navgraha Mantra after pooja on the Tuesday.Or visit the Navagraha temple and performing pooja in the temple on Tuesday.

cancellations of Mangal Dosha:
1.  When boy and girl both are ‘Manglik’. Than Mangal dosh is cancel in mutually.
2.  When a strong benefic Planet is placed in the 9th House
3.  When Mars is in Leo or in 8th House
4.  When Mars is in Sagittarius or in 12th House.
5.  When Mars is exalted
6.  When Mars is in own sign Aries or Scorpio
7.  When Mars is combust
8.  When Mars is aspected by a benefic.
9.  When Mars is debilitated.