The Compendium of Caraka 8.9.84

8.9.84

(&upavāsātiśokātirūkṣaśītālpabhojanaiḥ/) duṣṭā doṣāstrayo &manyāpaścādghāṭāsu vedanām//

Due to fasting, excessive grief, and eating food that is excessively dry, cold, or meager, the three doṣas are vitiated,
[producing] pain in the neck, back of the head, and temples.