In astrology, Rahu is considered a sinful planet. In Vedic astrology, Rahu is called the planet of harsh speech, gambling, travel, theft, evil deeds, skin diseases, religious journeys etc. The person whose Rahu is sitting in inauspicious place in the birth journal, or if suffering, then this person gets its negative results. In astrology, the planet Rahu does not own any zodiac sign. But in Gemini sign it is high and in Sagittarius sign it is in low house.
Rahu is a shadow planet with no physical form. In fact, when the moon comes between the sun and the earth, and if the moon is facing towards the sun, then the shadow of the moon falling on the earth represents the planet Rahu.
At the time of the churning of the ocean, an asura named Swarabhanu fraudulently drank a few drops of divine nectar (अमृत). Sun and Moon recognized him and revealed to Lord Vishnu in the Mohini avatar. Before the nectar descended from his neck, Lord Vishnu cut his throat from the Sudarshan Chakra. But by then his head was immortal. This head became the planet Rahu and torso Ketu and this is the reason why the Sun and Moon have a hatred, due to this malice.
If Rahu is auspicious in a person's horoscope, then auspicious thoughts are generated in the person's brain, which leads to good actions. If a person's intellect is directed in the right direction, he can achieve heights. With the positive effect of Rahu, a person works with his intellect and if a person acts on his intellect, the biggest mountain can move.
Due to weak Rahu in a person's horoscope, he has to face many types of problems. These problems can also occur mentally and physically. Due to afflicted Rahu, problems of hiccups, insanity, intestinal problems, ulcers, gastric etc. are born.