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Dog head tremors are the most serious of other forms of tremors, which are usually caused by abnormalities in the cerebellum. The common cause of head tremors in dogs is cerebellar hypoplasia, which may be a genetic condition or caused by infections like that of herpes virus. Dog leg tremors are caused by metabolic disorders like low blood sugar or kidney failure.
Head tremor can be due to a condition called essential tremor (essential head tremor: EHT) or due to dystonia and in that case the tremor is labeled dystonic tremor (dystonic head tremor: DHT).YSTONIC HEAD TREMOR, WITH FOCAL DYSTONIA. Dystonic head tremor (DHT) causes an irregular head tremor, which is easy to diagnose when it occurs in a patient with an obvious cervical (neck) dystonia (with abnormal head posture and muscle spasms).