She started her career with the 2012 Zee TV's show Mrs. Kaushik Ki Paanch Bahuein as Aashi.
[7][8] Dhawan began her career with the 2012 soap opera Mrs. Kaushik Ki Paanch Bahuein, which she played the role of Aashi on Zee TV.
[9] Later she featured to play the pivotal role in Ekta Kapoor's romance-drama series Yeh Hai Mohabbatein.She is portraying alongside an ensemble cast including Divyanka Tripathi, Karan Patel and plays the role of Child Ruhi Bhalla on Star Plus channel.
After this leap, Ruhanika is playing the character of Child Pihu Bhalla who is the step younger sister of Ruhi and the biological daughter of Raman and Ishita.
While working in Yeh Hai Mohabbatein, she approached to play in the 2014 Salman Khan starred action drama film Jai Ho, in which she appeared as a cameo.