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Dear Customer
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can neck and head movement repeatedly cause headache :
it may cause headache , usually its not sudden onset but gradually one , because changes in blood supply and blood pressure happen over time of repeating head and neck movement 
what is the treatment of headache :
1. avoid stress and anxeity sources 
2. stop taking any medication that causes headache as a side effect 
3. stop using any high brightness screens such as phones and laptops 
4. have a rest and avoid over load physical stress
5. drink relaxant drinks such as green tea and avoid black tea and coffee 
6. avoid smoking if you are a smoker 
7. take pain killer medications such as aspirin and paracetamol only on need , dont take more than 2 pills at time 
8. if your headache presist for longer than 6 hours daily or more than 3 times a week or new signs or symptoms appear , visit internal medicine doctor to do the medical checks and determine the causes and treatment pathways 
what are the causes of headaches :
1. life style 
2. some types of mediction as a side effect 
3. high blood pressure 
4. smoking 
5. neuroligical disease such as migrines ( usually have other sings and symptoms ) 
6. secondary to chronic diseases ( usually have other sings and symptoms ) 
7. infections ( usually have other sings and symptoms ) 
our advice :
you are a HTN patient , so high blood pressure is a common cause of headaches , please consult an internal medicine soon especially if your headache presist for longer than 6 hours daily or more than 3 times a week or new signs or symptoms appeared
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Kind Regards