Bollywood mega star Amitabh Bachchan’s health has deteriorated, as in his own words the actor is experiencing 'unbearable pain' after an old shoulder injury flared up recently.

Big B shared in his personal blog how he was feeling after the injury recently got aggravated when the 75-year-old actor did some heavy lifting on the movie sets. ‘Piku’ actor is currently under medication and applying ice compresses to his injury.

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"... Old injury to the left shoulder has, through time and activity and age, been giving nagging pain... That has recently got aggravated due some strong usage on set... and though the pain became unbearable, the medication and diagnosis has shown that it is an extra tear on the rotor cup but that it has not reached an alarming stage," Big B wrote in his blog.

The original ‘Don’ of Bollywood recently attended Virat-Anushka’s Mumbai reception wearing a black sling for medical purposes. The actor attended the high-profile event alongside his daughter Shweta Bachchan Nanda.

On work front, Amitabh will next be featuring in 'Thugs of Hindostan' alongside Aamir Khan, Anushka Sharma and Katrina Kaif and '102 not out' alongside Rishi Kapoor.