The incident took place in Madhopur village, Amethi Superintendent of Police Alankrita Singh said.
She did not say what was the reason behind the seer's action.
"There are many theories going around in the area. Some say this was to protest against what Asaram is alleged to have done while close associates said the seer was afraid he could be framed in a similar fashion," an investigating official said.
Doctors have referred the man to Sultanpur for plastic surgery.