What illness did Amir Shakkar suffer from, and what was Sai Baba's prescribed remedy?

Amir Shakkar was afflicted with rheumatism, a condition causing pain in the joints. When he detailed his illness to Sai Baba and prayed for relief, Baba offered a unique remedy. As explained in Chapter 22, instead of a conventional medicine, Baba instructed Amir to stay steadily in the Chavadi. This was a challenging prescription, as the Chavadi was a dilapidated and uncomfortable place. However, Amir's obedience to Baba's word was the true medicine, and he was told to reside there for nine months, even being forbidden from visiting the Masjid during this period.