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सूर्योदयेंऽशुसन्तापाद्द्रवं विष्यन्दते शनैः| ततो दिने शिरःशूलं दिनवृद्ध्या विवर्धते||८०||

Thus, affected by the vitiated rakta and vata, at sunrise due to the heat of sunrays these slowly liquefy and thereby during the day there is headache which increases with the day. At the end of the day as they solidify, the headache subsides.

english translation

sUryodayeM'zusantApAddravaM viSyandate zanaiH| tato dine ziraHzUlaM dinavRddhyA vivardhate||80||

hk transliteration by Sanscript