Hi thanks for posting your query.You have mentioned that you have
constant headache along with nausea.According to my opinion intake of faulty diet causes aggravation of pitta or excessive heat in the body which impairs digestion leading to ama formation .This ama gets stored in manovahi strotras or nervous system causing headache and nausea.If your all tests are normal then there is no need to worry but you have to strictly follow proper
diet plan and lifestyle changes
Avoid food which aggravate pitta or heat in the body like sour,spicy,tea,coffee,caffeine,non veg,chillies,alcohol.
Consume food which have cooling effect on body like coriander,coconut water,cucumber,mint,amla ,
aloe vera ,green vegetables,fresh fruits,buttermilk.
Avoid exposure to sun.
Take effective herbal preparations like brahmi churn,saraswat churn,shankhpushpi after consultation with doctor.
Practise yoga as an as and pranayam daily like anulom vilom,bhastrika,bhramri,
meditation,vajrasan,pavanmuktasan
You can undergo panchkarma therapies like
SHIRODHARA( pouring of herbal oils on forehead)
NASYA(administration of Anu oil into nostrils)
MASSAGE(
head massage with brahmi and bhringraj oil)
I hope I have cleared your doubts.
In case you need further information I am there to help you.
Best wishes for good health!
Kind regards
Dr.Pallavi