Jesus sent him away at once with a strong warning:

"See that you don't tell this to anyone. 

But, go, show yourself to the priest and offer the sacrifices that Moses commanded for your cleansing, as a testimony to them."

Instead, he went out and began to talk freely,

spreading the news.

As a result, 

Jesus could no longer enter a town openly but stayed outside in lonely places.

Yet the people still came to Him from everywhere.

Mark 1:43-45