and anomalous climate/season are the general causative factors of shiroroga. The above factors provoke or vitiate vata, affecting rakta (blood circulation) in the head leading to shiroroga with various symptoms.
[Importance of the Head] Shira (head) is foremost among all organs as it is the region of the body where the vital centres and all the senses (indriya) of a living-being are located It is vital (uttama) amongst all the other organs of the body
अर्धावभेदको वा स्यात् सर्वं वा रुज्यते शिरः| प्रतिश्यामुखनासाक्षिकर्णरोगशिरोभ्रमाः ||१३||
[Diseases of the Head] Hemicrania (ardhavabhedaka), headache (sarvam va rujyate shiraḥ) (i.e., that which may involve whole of head), coryza (pratishyaya), disorders of mouth, nose, eyes, and ears (mukhanasakshikarṇaroga), giddiness/vertigo (shirobhramaḥ),
facial paralysis (ardita), tremors of the head (shirasaḥ kampa), stiffness of the neck, nape and jaw (galamanyāhanugrahah) and other such diseases of the head are caused by dosha and micro-organisms/worms (krimi).
पृथग्दिष्टास्तु ये पञ्च सङ्ग्रहे परमर्षिभिः| शिरोगदांस्ताञ्छृणु मे यथास्वैर्हेतुलक्षणैः ||१५||
[Types of Diseases of Head] As mentioned in Ashtodariya Adhyaya, there are five types of shiroroga that are described here with their etiological factors , signs and symptoms