The 25th chapter of Madhava Nidana deals with Amavata Nidana which is the diagnosis of Rheumatism. Rheumatoid arthritis is a chronic inflammatory disorder that can affect more than just your joints. An autoimmune disorder, rheumatoid arthritis occurs when your immune system mistakenly attacks your own body’s tissues.
Chapter 24 — Urustambha Nidanam
The 24th chapter of Madhava Nidana deals with Urustambha i.e., Stiffness of the leg. The most common cause of muscle stiffness is a sprain or strain, which can affect both the muscles and ligaments. A strain is when the muscle fibers are stretched or torn. Strains are particularly common in the legs and lower back. A sprain is when the ligaments have been stretched, twisted, or torn.
Chapter 23 — Vata Rakta Nidana
The 23rd chapter of Madhava Nidana deals with Vata rakta nidana that is Gout. Gout is a common and complex form of arthritis that can affect anyone. It’s characterized by sudden, severe attacks of pain, swelling, redness and tenderness in one or more joints, most often in the big toe.
Chapter 22 – Vata Vyadhi Nidana
The 22nd chapter of Madhava Nidana deals with Vata Vyadhi Nidana which is the diagnosis of the diseases of the nervous system. Infections, such as meningitis, encephalitis, polio, and epidural abscess. Structural disorders, such as brain or spinal cord injury, Bell’s palsy, cervical spondylosis, carpal tunnel syndrome, brain or spinal cord tumors, peripheral neuropathy, and Guillain-Barré syndrome.

Chapter 21 – Apasmara Nidana
The 21st chapter of Madhava Nidana deals with Apasmara which is epilepsy. Epilepsy is a central nervous system (neurological) disorder in which brain activity becomes abnormal, causing seizures or periods of unusual behavior, sensations and sometimes loss of awareness.
Chapter 20 – Unmada Nidana
The 20th chapter of Madhava Nidana deals with Unmada Nidana which is Insanity. Mental illness, also called mental health disorders, refers to a wide range of mental health conditions — disorders that affect your mood, thinking and behavior. Examples of mental illness include depression, anxiety disorders, schizophrenia, eating disorders and addictive behaviors.