Grahan Dosh (Eclipse Dosh)
When: Sun or Moon is with Rahu or Ketu
Kemdrum Dosh
When: Moon is alone with no planets on both sides of it.
Mangal Dosh (Manglik Dosh)
When: Mars is in 1st, 4th, 7th, 8th, or 12th house.
Angarak Dosh
When: Mars + Rahu come together.
Shani Dosh / Sade Sati
When: Saturn transits over your Moon sign (7.5 years).
Pitra Dosh
When: Sun is afflicted OR Rahu in 9th house.