"Therapy is on. It will take some time to recover completely," Banerjee, who returned to office yesterday after nine days, told reporters.
The chief minister who was in office for a little over four hours yesterday today stayed for around five hours.
She had earlier said that too much work was piling up.
Banerjee was discharged from a private clinic on Saturday. She had fallen ill after she was heckled on April 9 at the Yojna Bhavan in Delhi by members of Students Federation of India.