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Headache after taking lots of water. What to do?

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My boyfriend weighs 280 pounds and this morning he drank about 4 bottles of water within an hour. Later he got a really bad headache but also didn't eat all day. He took some ibuprofen and went to sleep but when he woke up he still had a slight headache. Should we be concerned?

Category: Internal Medicine Specialist

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Dr. Jaydeep Tripathy
Category: HIV- AIDS Specialist
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Expert:  Dr. Jaydeep Tripathy
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Hello,
Thank you for your query at DoctorSpring.com
I understand your concern.
Did he have any episode of loose stools or diarrhea before he drank 4 liters of water? Or any history of dehydration?
Headache could be due to stress/ dehydration/ migraine/ secondary to long periods of work.
Does he have any medical history of cardiac ailments/ hypertension?
Feel free to discuss further,
Regards


Patient replied :

No he has none of any of those questions you asked me. He just wants to make sure he doesn't have water intoxication.


Expert:  Dr. Jaydeep Tripathy
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Hello,
Thank you for your follow-up.
No, you need not worry about water intoxication/ dilutional hyponatremia.
Even though not a lot of research has been done in this condition, but available papers suggest that a man will be at risk of dilutional hyponatremia, if he consumes 6 liters of water within 30 minutes, and his weight is not more than 150-180 pounds.
So considering his body weight, it should not be a problem.
Feel free to discuss further,
Regards.

Dr. Jaydeep Tripathy
Category: HIV- AIDS Specialist
Experience: 
MBBS from Sri Ramachandra University in December 2011
M.Med (Family Medicine) - TNMGR University, Chennai
MBA-MPH in Public Health in March 2016, SRM University
Finished AFIH in March 2016, SRM University
MRCP ( UK ), Internal Medicine, Royal College of Physicians, June 2016
Fellowship in Diabetology from Martin Luther University in January 2017

Currently Resident Physician, in MD Radiodiagnosis - Kamakshi Memorial Hospital, Chennai
Dr. Jaydeep Tripathy and 4 other Medical Specialists are ready to help you

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