Sometimes when your calcium/magnesium ratio is off, you can get twitching. I get one in my diaphram that feels like a fish flopping in my chest. If you are low in calcium intake, or very low in magnesium, the muscles do a dance of sorts. So you could try to balance that out.
(February 2017) A concrete slab is a common structural element of modern buildings. Horizontal slabs of steel reinforced concrete, typically between 4 and 20 inches (100 and 500 millimeters) thick, are most often used to construct floors and ceilings, while thinner slabs are also used for exterior paving.
Sweating Slab Syndrome and Efflorescence A slick and slippery concrete floor is not normal! A wet floor may cause accidental slips, trips, and falls and can be very dangerous for forklift and other machinery as they may be unable to brake or stop when needed. Most often, the cause of a damp concrete floor can be explained as Sweating Slab Syndrome. Most times Sweating Slab Syndrome is accompanied by concrete efflorescence. Efflorescence appears as a white, powdery substance often in a map cracking pattern and is the result of the evaporation of the accumulated moisture.