She kept her diagnosis private during treatment to protect her energy and her two children, but is now sharing the news as "carrying it quietly has been heavy".
Krishan, an NHS GP, stated that despite her medical background, "absolutely nothing prepares you for being on the receiving end" of such a diagnosis, describing the shock, fear, and trauma.
She urged people to get themselves checked if they have a "gut instinct" that something is wrong, emphasising that health is paramount.
Her Strictly co-stars, including Gorka Marquez and fellow breast cancer survivor Amy Dowden, have offered an outpouring of support following her announcement.