On Madhubala's illness
Madhubala first vomited blood when she was in Chennai shooting for S S Vassan's Bahut Din Huwe (1954). She was treated, and she resumed shooting. Nobody thought she was sick until she fainted on J K Nanda's sets while shooting with Raj Kapoor on Chalack (1957). The film never got completed. That's when the doctor said that she had a hole in her heart. She was 24 then.
She was advised bed rest for three months, but after a month of rest, Madhubala resumed work. Looking at her, one would not say that she was sick. She, herself, was not ready to believe that she was sick.
Her last film was Mughal-E-Azam, which released in 1960. People think that she worked after that too, but that's not true. She had completed all her films in the 10 years that it took for Mughal-E-Azam to be made.
Some movies released after she was bedridden but she was in no condition to work after Mughal-E-Azam. In fact, in some of the scenes, you will notice that she looks pale and sick.
Also Read: Madhubala's last love story