Mercury Mahadasha period is for 17 Years in a Horoscope. It has a grass green complexion, is a yogi, pure, rajasic, as well a speech that is skillful. It is of a disposition. Likewise, it places on clothes.
It is witty and likes laughter and jokes. Its motor vehicle is a lion with the back at an elephant. It is the son of the Moon. It is adaptable.
Mercury represents hypochondria, disturbance in the think-big process, worry, apprehension of the likelihood of something untoward happening, bad speech, diseases in the eye, throat, nose, and skin.
Mercury is neutral and whenever it comes under the sway of another planet, it may take on its own character and influence.
Jupiter governs the realm of abstract thinking.