I read about a man named Amir Shakkar. What was his illness and what strange treatment did Sai Baba give him?

Amir Shakkar was suffering from a painful condition of rheumatism and sought a remedy from Sai Baba. As narrated in Chapter 22, Baba's prescribed cure was highly unconventional. Instead of medicine, Baba instructed Amir to reside continuously in the Chavadi, an old and dilapidated structure. This was a difficult instruction, as the Chavadi was damp, cold, and generally unsuitable for someone with his ailment. Baba's firm words were his only medicine, and he was told to stay there for nine months, accepting Baba's word with faith despite the externally contrary conditions.