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5. HEADACHE ATTRIBUTED TO HEAD AND/OR NECK TRAUMA 6. HEADACHE ATTRIBUTED TO CRANIAL OR CERVICAL VASCULAR DISORDER 7. HEADACHE ATTRIBUTED TO NON-VASCULAR INTRACRANIAL DISORDER 8. HEADACHE ATTRIBUTED TO A SUBSTANCE OR ITS WITHDRAWAL 9. HEADACHE ATTRIBUTED TO INFECTION 10. HEADACHE ATTRIBUTED TO DISORDER OF HOMOEOSTASIS 10.1. Headache attributed to hypoxia and/or hypercapnia 10.2. Dialysis headache [Y84.1] 10.3. Headache attributed to arterial hypertension [I10] 10.4. Headache attributed to hypothyroidism [E03.9] 10.5. Headache attributed to fasting [T73.0] 10.6. Cardiac cephalalgia [code to specify aetiology] 10.7. Headache attributed to other disorder of homoeostasis [code to specify aetiology] Bibliography11. HEADACHE OR FACIAL PAIN ATTRIBUTED TO DISORDER OF CRANIUM, NECK, EYES, EARS, NOSE, SINUSES, TEETH, MOUTH OR OTHER FACIAL OR CRANIAL STRUCTURES 12. HEADACHE ATTRIBUTED TO PSYCHIATRIC DISORDER 

IHS	Diagnosis	ICD-10
10.4	Headache attributed to hypothyroidism [E03.9]	G44.882

Diagnostic criteria:

Headache with at least one of the following characteristics and fulfilling criteria C and D:
1. bilateral
2. non-pulsatile
3. continuous
Hypothyroidism is demonstrated by appropriate investigations
Headache develops within 2 months after other symptoms of hypothyroidism become evident
Headache resolves within 2 months after effective treatment of hypothyroidism

Comment:

It has been estimated that approximately 30% of patients with hypothyroidism suffer from headache. Its mechanism is unclear. There is a female preponderance and often a history of migraine in childhood. Headache attributed to hypothyroidism is not associated with nausea or vomiting.

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IHS vs. ICD-10

To facilitate headache diagnosis in daily practice, the classification provides the corresponding WHO ICD-10NA codes for each IHS code.

IHS Subcommittee

The Classification Subcommittee prepares and revises the International Classification of Headache Disorders.

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Cephalalgia

Cephalalgia is the official journal of the IHS. It contains original papers on all aspects of headache. The journal provides an international forum for original research papers, review articles and short communications.www.cephalalgia.org

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