Police spokesperson said the seven-year old boy, a nursery student used to go for tuition classes in Ashok Nagar area.
According to an FIR, on Friday during the tuition class, the child wet his trousers on the bed, angered over the incident, the tuition teacher held the child with force while her mother burnt the child using hot tongs.
The child suffered burns on his face, stomach, limbs and some other vital parts, police said.
The child was first admitted to a private hospital for medical treatment. But for medical examination he was sent to a government hospital where 17 burn marks were discovered on his body during the investigations.
The accused is a private school teacher while her mother is class four employee in a state government agency, police said.