I'd push to see a neurologist. I did (twice, in fact!). It was the neurologist who suggested a hormonal cause too, once he'd check for other things. Just saw this on another meno site.
Menopause and Electric Shocks on the Skin
The sensation of electric shocks on the skin can be quite disconcerting and uncomfortable. You may experience this common menopause symptom as a twitching sensation, zaps, tingles or the feeling of a rubber band snapping inside your skin. In some cases, the tingling, numbness or twitching of shocks may precede a hot flash or night sweat. Natural menopause treatment products may be able to relieve your discomfort.
As your estrogen levels fluctuate during perimenopause and decrease during menopause, your nerve tissue can be affected. You may experience numbness in your extremities or electric shocks on the skin. Both of these irritating symptoms are linked to abnormal electrical impulses passing through your body, or misfiring neurons.
Electric shocks on the skin can range from mild to quite painful, but they can be managed. Lifestyle changes and a menopause natural cure are often able to provide significant relief. Women who are experiencing this symptom should avoid alcohol and caffeine. Getting regular exercise and eating a healthy diet that is rich in vitamins B, C, D and E may alleviate abnormal nerve impulses. Women who are experiencing significant stress may benefit from stress management techniques, relaxation programs, massage or aromatherapy.