The 8th House indicates disease, defeat, punishments, accidents, longevity, mode of death & surgery.
To understand whether a disease will be chronic, study the 8th house in detail. Malefic planets spoil the 8th house significations.
The malefic houses in Astrology are known as Trika houses, viz, 6, 8 & 12.
Shastam tadha dwadasa mashtamam cha
Bhavan Anishtal pravadanti that jna
Saturn, Rahu and Mercury in the 8th House indicate that the disease may make a chronic turn.
The first decanate or Drekkana of the Eighth House represents the first 1/3 rd of the body, the second Drekkana or decanate the second half and third, the third half.
We have said that the 8th house is the house of Diseases and Death.
Whenever the lord of the 8th house is afflicted by malefic planets, the native undergoes operation connected with reproductive organs and sex.
Diseases caused by Different planets in the Eighth House
Sun in the 8th - Causes high fever, eye sight defects, urinary tract infections. palpitations and migraine. Sun in the Eighth is not at all desirable for Health.
Moon in the 8th - In the EIghth House, Moon causes mental tension, as he rules the Psyche ( Mano Matharo Sheetharashmi ). Generally not conducive to good health, Luna can cause Diarrohea.
Mars in the 8th - Tumors, boils, accidents, operations are all caused by Mars. He is the planet of Surgery. Mental aberrations are also caused by him, if he be conjunct with the Moon. Eighth Mars makes one over-sexed.
The North Node - Ulcers are caused by this shadowy planet. Eighth Rahu can create immense mental tension, as he will not allow mental peace to reign supreme. For females, he will create incompatibility of temperament with spouse and sometimes widowhood.
Jupiter in the EIghth - Although he is the least harmful planet in the House of Death, it causes pancreatic diseseas and jaundice. He may give luck and a regal life, but sleeping sickness, gall bladder disease are also caused.
Venus in the Eighth causes sexual weakness and diabetes. Diseases of the bladder and an inferiority complex due to mental fluctuations. Even though Venus in the House of Death is extolled for conferring longevity, financial prosperity and good fortune, he can give health hazards
Saturn in the Eighth is extolled for longevity ( Ashtamasthe Sani Ista Thasyal ). But a long suffering life is indicated, as Saturn can give immense sorrow. There will be a yearning for getting away from it all. Paralysis and tumors caused by this melancholy planet become chronic.
Mercury in the House of Death causes paralysis and nervous diseases. There may be longivity due to the principle that a benefic increases longevity when posited in the Eighth, but a weak constitution will be conferred.
South Node in the Eighth causes ulcers and accidents. Mental fluctuations, quarrels with spouse, operations in the region of the sex organs. Causes pain and discomfort. If posited with Moon, suicidal tendencies.