Jupiter rules the phlegm in our body. Moon, Venus and Mercury have also slight influence upon it. The fourth house and its lord govern this disease. Karkata rasi is the seat of this disease in natural zodiac. Affliction of Karkata rasi, fourth house, lord of fourth house and Jupiter mainly work for the disease of phlegm and cough. Their conjunction with malefics, situation of planets ruling same in evil houses, relation of the above houses and planets with sixth house, lord of sixth house, Kanya rasi or disease inflicting planet, all these give rise to diseases resulting from phlegm and cough. Affliction of any of the planets Moon, Venus, Mercury along with afflicted Jupiter make one constant sufferer of phlegm and cough.
When along with them the houses and planets rulling cough and phlegm be afflicted and be related with disease inflicting house or planet, they result into various kinds of diseases connecting the same. When malefics pass over the above houses and planets in transit or afflict them by aspect, one may be worried from the trouble from cough and phlegm, provided such houses and planets are afflicted in natal chart.
The following stars rule the phlegmatic qualities and one from under any of these stars as lagna or rasi and one having these afflicted will have excess of phlegm and is liable to suffer from diseases connecting the same :—
Krittika, Rohini, Ashlesha, Mogha, Swati, Visakha, Uttarashara, Sravana and Rebati.