Hyperkalemic periodic paralysis

Hyperkalemic periodic paralysis (HYPP, HyperKPP) is an inherited autosomal dominant disorder that affects sodium channels in muscle cells and the ability to regulate potassium levels in the blood. It is characterized by muscle hyperexcitability or weakness which, exacerbated by potassium, heat or cold, can lead to uncontrolled shaking followed by paralysis. [Source: Wikipedia ]

OrphaNet reference
Hyperkalemic periodic paralysis 
May Cause
Myotonic disorder
May Be Caused by
Andersen syndrome