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Quite absorbed in his work, young heartthrob Sidharth Malhotra has been very busy with shooting back to back films. Following which, our sources revealed, Sidharth's mother has been extremely concerned about his health. Reason being, the actor has been constantly gaining and losing weight for his characters on screen.

After 'Hasee Toh Phasee', Sidharth gained weight for 'Ek Villain'. Immediately after which he pumped iron and bulk up for his role in 'Brothers'. Sidharth gained 6-8 kgs in less than two months for 'Brothers'. He drastically changed his diet, workout regime and eating patterns for his role. However once he finished shooting for 'Brothers' he had to go back to being lean for Shakun Batra's 'Kapoor and Sons'.

Sidharth again had to lose all the muscle weight and change his look. With the constant change in body, the actor`s mother has been concerned about his health. He has put on and lost weight in quick succession and that she feels is not medically advisable.

Said a spokesperson of Sidharth, "Sidharth likes to get into the skin of his characters. He feels it is essential to get the look of his character right. His mother is really proud and supportive of how he has opted for versatile roles. However she feels he should pay more attention to his health."

That's really true! Please take care Sid!