Towards the end of the Ketu Dasha you get a terrible sting just when you think it is all over . While the Jupiter antardasha in Ketu tries to rob you of all spiritualism you suddenly feel in the midst of Negative powers and start feeling that your prayers are unheard and (ketu blocks jupiter from giving fruits of your good deeds) ,the ketu Mercury antardasha robs you of all intellect even the wisest decision which you take will be unheard , unappreciated and give you loss and if someone else just present the same view point he will be highly appreciated.
Ketu Mercury anatardasha will also give you loans and debt as Mercury in kala purush Kundli also rules Virgo the orginal house of debt so debt may come easy but to trap you or may be denied after months of paper work and diseases and medical expenses will keep you busy and if any disease you have will go undiagnosed as Ketu block the mercury to manifest is fruits. You may change doctors after doctors but unable to detect what exactly is the source of medical ailment. Important documents and information may be lost when needed and your communication channels will be blocked, people will question your communication skills and though your reasoning will be very good your analysis will always receive scrutiny and same reasoning or analysis of others will be highly apprecated making your self doubt . The people around will make you feel as if you are foolest person in the Room.
However if you have a weak or combust Mercury in the chart or Mercury ketu conjunction then it will not be seem that bad . You will only say its always been so Harsh not much difference in Mercury and Ketu JUST DEJAVU but those with well placed Mercury in the Chart the contrast will be sharp to notice . Mecury is humorous planets but in Ketu Mercury all the humour is gone . The people around may be laughing and cracking the jokes but you may be trying to fiqure out the context of their laughter . If ketu is bad in the Chart it can give nervous system affliction and restless and if Mercury is good in Chart you will be surrounded by the dull and the moron who will by their sheer majority prove you to be a fool. . If Ketu and Mercury both are weak in Chart it will keep you running after after endless fruitless tasks that will drain our energies and give you mental exhaustion. It disrupt your daily routine and Job .
Mercury by very nature if disturbed in the Chart shoots you medical bills and disrupts your routine job. In the Ketu Mercury dasha even the daily task or bathing , washing clothes, going to job or school , cooking, washing utensils, sweeping , mopping may seem too curbersome and you will be chasing a lot of thankless jobs . The servants will be quickly joining and leaving you . Hipochondria may strike in some cases and anxiety is common.
The Second major impact is on your learning and schooling if you are young and on communication if you are a bit elder . You will be humbling for right words , cunning people make steal your copies, books, project, file works, destroy or hide it , stationary and desk items laptops, printer will be haywire and needing maintenance all the time . Your Ablity to recall and memorize may feel weak and you will feel difficulty in concentrating on work . Even if you cross these hurdles , some emergency or routine call will come that will try to destroy your work schedule. Mercury loves to gossip but you will want to stay quiet in all these conversation creating an Air of boredom , the spice of life is gone and focus is on finishing a deadline that you will not get the time for . Mobile that in mercury mahadasha was a medium of business expansion will turn a bit quiet and when it will ring it will be useless call .
Mercury rules over trade and Ketu will wipe away your customers and you will not know where they are vanishing silently . In Short whatever Mercury promotes Ketu tries to Block and in a span of over a year it will bring you to the verge of breakdown . So Thats why it called a Sting as it paralyse your nerves and intellect to the point of nervous breakdown and it makes you headless to realize why ketu is called a headless planet . The key to cross the Ketu and mercury antardasha is to just keep busy and not to apply head on what hurdles are coming on the way . The more head you will apply the sharper pain it give .
The Task of Ketu Mercury is to cleanse all the deceit , lies and cunningness we have done the past with naive people. While Rahu Mercury is all about manipulations. Ketu Mercury is to feel and land into the shoes of a naive person and despite all intellect feel the trap through which innocent person have to bear with. One year is short duruation to cleanse the deceits and cunnigness of life time so in Ketu Mercury it pour down in torrential amount . So don't apply your head to what is happening just keep busy with whatever comes in .