In the past, taxpayers weren't required to pay Medicare tax on income generated from investments such as capital gains, dividends, and taxable interest. Since 2013, however, you could owe a 3.8% Medicare tax on some or all of your net investment income (as part of the Affordable Care Act).
Restless legs syndrome (RLS) is a neurological disorder characterized by uncomfortable leg sensations that can interfere with resting or falling asleep. Experts believe that low levels of iron in the brain may be responsible for RLS. An imbalance of dopamine is also believed to be involved.
There are many things that may cause leg tremors. For example, a person may develop them in relation to a central nervous system disease or even because his thyroid gland isn't functioning properly. In some cases, medication may cause leg tremors, and even drinking to excess may stimulate them. Sometimes a person develops tremors because of an inherited condition. Unfortunately, there are even some cases in which doctors are unable to determine why the patient is experiencing tremors.