What it does
To find where in a land a deep defect or buried bone lies.
Where
The part of the plot that matches the body part, as mapped on the Vastu Purush
When
On the way to the land and while walking on it
Explanation and notes
These are sphuran (body signal) readings of nimitta gyan; itching is itself a form of sphuran.
When selecting a plot, flat or industrial land, the energy of the land itself decides about 70 percent of the result, more than slope, shape or surrounding structures. A building made fully as per directional vastu can still fail on land with bad energy.
The threshold (dehleez) of the home acts as a testing machine: the moment you step over it to go and see a plot, flat or factory, your breath and body signal whether that property is good. Equal flow in both nostrils or left-side body signs warn against it; earth or water element in the breath and right-side signs approve it.
Shakun shastra (nimitta gyan) reads the signs met on the way to a property; certain sights and events on the journey warn that the plot or flat is not good. They arise because the land's energy is already acting on the visitor's body chemistry.
Certain mangalik (auspicious) sights on the way to a property show that the plot or flat is very auspicious and will keep filling life with happiness.
The behaviour of street dogs, jackals and crows at a plot or flat reveals its quality: a crow cawing while facing East or North is a good sign, while crying dogs and a crow on a dry tree are grave warnings.
Twitching of an eye on reaching a land shows its quality, read in opposite ways for men and women: the right eye is auspicious for a man and the left eye for a woman.
What one first sees and hears on stepping onto a land or into a flat indicates its energy: black items, broken things, snake holes and harsh sounds are bad signs, while a conch, aarti or auspicious songs, a rainbow or a joyful sky are good ones.
Clothes that tear, get a hole, or get soiled with mud, dung or dirty water on the way to or at a land signal that the land is not good; the position of a tear shows how bad it is.