Snehana Nasya  

Samyak yoga:  

लाघवं शिरसो योगे सुखस्वप्नप्रबोधनम् | 
विकारोपशमः शुद्धिरिन्द्रियाणां मनःसुखम् ||३३|| (Su/Chi/ 40/33) 

Lightness of head, good sleep, easy awakening, reduction in illness and clarity of sense is the Lakṣaṇa of Samyak Kriya Snehana Nasya. 

According to Ashtaṅga Hṛdaya 

सम्यक्स्निग्धे सुखोच्छ्वासस्वप्नबोधाक्षपाटवम् || (As Hr/Su/20/23) 

Easy breathing, good sleep and clarity of senses are the Lakṣaṇas of Snehana Nasya. 

Atiyoga Lakṣaṇa 

कफप्रसेकः शिरसो गुरुतेन्द्रियविभ्रमः | 
लक्षणं मूर्ध्न्यतिस्निग्धे रूक्षं तत्रावचारयेत् ||(Su/Chi/40/34) 

Excessive discharge, heaviness of head and disorders of sense organs. 

स्निग्धेऽति कण्डूगुरुताप्रसेकारुचिपीनसाः|| (As Hr/Su/20/24) 

Itching, tastelessness and running nose is the Lakṣaṇas of Atiyoga Snehana Nasya. 

Treatment for Atiyoga: Rūkṣaṇa should be done. 

Ayoga Lakṣaṇa 

अयोगे वातवैगुण्यमिन्द्रियाणां च रूक्षता | 
रोगाशान्तिश्च तत्रेष्टं भूयो नस्यं प्रयोजयेत् || (Su/Chi/40/35) 

Vitiation of Vāta, dryness of sense organs and no remission of illness 

रूक्षेऽक्षिस्तब्धता शोषो नासास्ये मूर्द्धशून्यता||(As Hr/Su/30/24) 

Uneasiness in eye movements, Śoṣa of eyes, void feeling of nose, mouth and head. 

Treatment for Ayoga: Nasya should be administered again. 

Śōdhana Nasya  

Samyak yoga:  

लाघवं शिरसः शुद्धिः स्रोतसां व्याधिनिर्जयः | 
चित्तोन्द्रियप्रसादश्च शिरसः शुद्धिलक्षणम् || (Su/Chi/40/38) 

Symptoms of Samyak Śōdhana Nasya is lightness and clarity of head and it’s channels, reduction in disease condition and  Prasada of chitta, sense organs. 

उरःशिरोलाघवमिन्द्रियाच्छ्यं [२] स्रोतोविशुद्धिश्च भवेद्विशुद्धे||५१|| (Cha/Si/1/51) 

Lightness of chest and head, clarity of indriyas, clarity of srotases are thelakṣaṇas of Samyak śōdhana Nasya 

As per Caraka Lakṣaṇas of Ayoga are Gala Upalepa, Śiro Gurtwa and Niṣṭhīvana and its treatment includes Kaphaghna Cikitsa. 

Features of Atiyoga are feeling of Śiro, Śaṅkā, Sravaṇa, Arati, Toda and Timira and its treatment is Vātaghna Cikitsa. 

Dhūma Nasya 

Samyak-Ayoga  

यदा चोरश्च कण्ठश्च शिरश्च लघुतां व्रजेत्||५२|| 
कफश्च तनुतां प्राप्तः सुपीतं धूममादिशेत्| (Cha/Su/5/52) 

Lightness in Ura, Kaṇṭa and Śira are Samyak Lakṣaṇas. 

If the voice is not clarified and the throat is filled with  Kapha and head feels stiffened are  

are Ayoga Lakṣaṇas 

Lakṣaṇas of Atiyoga are palate, head and throat get dried up with heat sensation, the person gets thirsty and becomes unconscious, there is excessive bleeding,  excessive giddiness and fainting and dysfunctioning of sense organs. 

Cause of Nasya Vyāpat:  

तत्र हीनातिमात्रातिशीतोष्णसहसाप्रदानादतिप्रविलम्बितशिरस उच्छिङ्घतो विचलतोऽभ्यवहरतो वा प्रतिषिद्धप्रदानाच्च व्यापदो भवन्ति तृष्णोद्गारादयो दोषनिमित्ताः क्षयजाश्च ||(Su/Chi/40/48) 

If we administer Hīna Mātrā, Atimātrā, Atiśīta, Uṣṇa, Sahasā Pradāna, Atipravilambita, Śiraso Ucchiṅghato, Vicalita Śiras, Abhyavarato, Pratiṣiddha Pradāna all these cause complications like Doṣā Utkleśa Nimittajanya and Doṣa Kṣaya Janya. Eg; Tṛṣṇā, Udgāra etc.  

Management of Nasya Vyāpat 

According to Caraka 

अजीर्णे भोजने भुक्ते तोये पीतेऽथ दुर्दिने| 
प्रतिश्याये नवे स्नाते  स्नेहपानेऽनुवासने|| 
नावनं स्नेहनं रोगान् करोति श्लैष्मिकान् बहून्| 
तत्र श्लेष्महरः सर्वस्तीक्ष्णोष्णादिर्विधिर्हितः|| (Cha/Si/9/111) 

If Nāvana Nasya administered in contraindicated conditions like Ajīrṇa, Bhuktabhakta, Toyapīta etc. or in untimely season or conditions, Nava Pratiśyāya, after Snāna, after Snehapāna, after Ānuvāsana Basti then Nasya may produce Kaphaja Rogas. Treatment for the same is all Tīkṣṇa Uṣṇa Kaphahara Kriyas. 

क्षामे विरेचिते गर्भे व्यायामाभिहते तृषि| 
वातो रूक्षेण नस्येन क्रुद्धः स्वाञ्जनयेद्गदान्|| 
तत्र वातहरः सर्वो विधिः स्नेहनबृंहणः| 
स्वेदादिः, स्याद्घृतं क्षीरं गर्भिण्यास्तु विशेषतः|||(Cha/Si/9/113) 

If Rūkṣa Nasya administered in Kāshme or debilitated, Virechite or after any Śōdhana, Garbhe or conceived lady, Vyāyāma Abhihate or tired after exercise, tṛṣi or thirsty in them vitiated Vāta may produce Vātaja diseases. Treatment for the same is Vātahara Kriyas like Snehana, Swedana, Bṛṃhaṇa. Specially for Garbhini Ghṛta or Kṣīra can be used. 

PARIHĀRYA VIṢAYA OF NASYA KARMA 

निवातोष्णसमाचारी हिताशी नियतेन्द्रियः| (Cha/Su/5/69) 

Snehācārika Vidhi should be followed like living in Nivāta Gṛha and not exposing to excess Vāta, Uṣṇa Sevana, controlling Indriya is told as Parihāra Viṣaya.  

रजोधूमस्नेहातपमद्यद्रवपानशिरःस्नानातियानक्रोधादीनि च परिहरेत् (Su/Chi/40/31) 

As per Suśruta, Rajo-Dhūma-Sneha-Ātapa-Madya-Drvapāna-Śiraosnāna-Yāna-Krodha should be avoided. 

अत्यासनस्थानवचांसि यानं स्वप्नं दिवा मैथुनवेगरोधान्||५४|| 
शीतोपचारातपशोकरोषांस्त्यजेदकालाहितभोजनं च|५५|  (Cha/Si/1/54) 

After any Śōdhana including Nasya excessive sitting, standing, talking, travelling, day sleeping, coitus, holding natural urges should be avoided. Indulgence in cold activities, sunlight, greif, anger should be avoided. Avoid intake of untimely and non-conducive foods.  
 

Parihara Kāla  

कालस्तु बस्त्यादिषु याति यावांस्तावान् भवेद्द्विः परिहारकालः|    (Cha/Si/1/54) 

Parihara kāla is the double number of days of undergoing the Śōdhana or Nasya.