Thanks for query on HCM. Migraine headache is always episodic and associated with nausea,vomiting. It is triggered by some factor and you have be watchful for that. It usually occurs after stress,anxiety,disturbed sleep and diet pattern,workload and any unfavorable condition in routine life. Take nsaid,metoclopramide,flunarizine combination drug to avoid headache,nausea. Long course of flunarizine will be helpful to reduce episodes of headache. Otherwise avoid stress,go for exercise,yoga,meditation regularly. Drink more water and other liquids,eat good nutritious diet. Keep in touch with your doctor.