Muscle knots can cause pain in two ways: (1) latent trigger points, which are knots that only hurt when you put pressure on them, and (2) active trigger points, which are knots that actively refer pain along your neural pathways, causing it in non-localized areas.o treat the muscle knot, simply roll the massage ball pressed either to the wall or the floor one side, and your body on the other over your muscle. You can use two tennis balls, or TPT massage balls if you want to go firmer or deeper.
At standard temperature and pressure, ethane is a colorless, odorless gas. Ethane is isolated on an industrial scale from natural gas, and as a byproduct of petroleum refining. Its chief use is as petrochemical feedstock for ethylene production.
Prior to the 1960s, ethane and larger molecules were typically not separated from the methane component of natural gas, but simply burnt along with the methane as a fuel. Today, ethane is an important petrochemical feedstock and is separated from the other components of natural gas in most well-developed gas fields.