What do you mean by snake head evil?

The snakehead is the shadow of a street lamp, a telephone pole, a big tree or a tall building shining into the house to form a snakehead, which is similar to the snakehead, so it is called the snakehead.

This is generally classified as piercing the heart in feng shui.

The way to eliminate it is to put a shape gram in the evil position and use more eagle ornaments.