She made her debut in Bollywood with the film Waaris released in 1988. She is best known for her role as Tara in the soap opera Tara, Kavyanjali, Kasautii Zindagii Kay. She has acted in a number of Punjabi movies as well.
Nishan has had roles in the movies Dilwale, Waaris, Yeh Lamhe Judaai Ke,,, Hum Hain Rahi Pyaar Ke, Raja Hindustani, Akele Hum Akele Tum, Haan Maine Bhi Pyaar Kiya and Mela.
She also appeared in the 2010 Bollywood film My Name Is Khan. Andaz as Urmila Cafe 18 Chanakya Tara Sabsey Bada Rupaiya Jassi Jaissi Koi Nahin Hitler Didi Zee horror show Madhubala Ek Ishq Ek Junoon The Great Indian Family Drama Yeh hai mohobateein Shastri Sisters as Nikki (2014).