1)Before Knowing effect of Ketu in 1st house we have to Know about Ketu and 1st house. So you may also read this
Tanu Bhav Base of Your Horoscop—-
Ketu–Destroyer of Materialistic World—-
2)So after reading this two article we have know that generally first House effect our body constitutions, health, brain,nature and behaviours.
3)Body constitutions—Ketu belongs to tall heights so native may be tall in heights.Ketu belongs to fair colour so native may be fair in colour but same time ketu give results according to rashi where he sit so body colour also depand on depositor of ketu. Ketu is natural Melific so it is also indicating lean and week body constitutions. Some time it is also indicating deformed body constitutions but for this there must be strong indication in chart.
4)Health—Ketu is natural Melific so 1st house ketu give issue related to health.Ketu is karak of accidents and cutting type matter so 1st house ketu may indicating problem in health from accidents or from body cutting.Ketu in 1st also indicating skin problem.Ketu belongs to concentration so it is indicating extremely concentration in matter which also cause mental stress so native may suffering from hypersensativity or hysteria type problem or problem which occurs from Mental stress.
5)Brain,Nature and Behavior—-
Ketu is planet which expose inner truth of matter so ketu in 1st house native may be explosive in nature,violent in nature, emotinol with mentally stress in nature.Ketu comes with idealism showcase so when ketu in 1st native may show extremely idealism but Actualy they don’t in real(Due to ketu as a shadow planet ). So they may be fraudy,eccentric,immortality in behavior.Ketu also belongs to Fanaticism so native are extremely fanaticism in nature(Just like Salmankhan Famous dialogue “Ek Baar Jo Mai Nai Commitment Kar Di To Mai Apnai Aap ki Bhi Nahi suntha”). Ketu in 1st make native unhappy,unsatisfied,ungrateful,unsocial in nature due to this fanaticism behavior.
ketu is also Karak of spirituality so ketu in 1st house also make native with god gifted power of spirituality. So native may be spiritual and religious.They may be doing miracle matter for world.
Ketu belongs to harshly and rudely behavior so native may show such type behavior.