Scabies is caused by a tiny mite called Sarcoptes scabiei. A scabies infection is transmitted either person to person or by contact with contaminated bedding or clothing. The mite burrows under your skin to lay its eggs.

Garlic, also know as alliums sativum, is not only a cooking ingredient, but is also used medicinally to treat various conditions. Garlic enemas traditionally have been used as home remedies for fever, internal parasites and diarrhea.

Arnica is a flowering plant often used in homeopathic and herbal treatments for recovery from surgery, dental work, sprains, bruising, sports injuries, burns, ulcers, edema, arthritis, wounds, phlebitis, joint pain, swelling due to fractures and skin problems.

Mustard, an annual in the cabbage family, produces tiny black seeds with a pungent quality. The black mustard plant is native to southern Europe, while the brown mustard plant originated in Asia.

Tachycardia, or elevated heart rate, is a type of arrhythmia, or a disorder of heart rate or rhythm. Arrhythmias, notes the National Center for Biotechnology Information, are caused by dysfunction in the heart's electrical conduction system.

Epimedium is a genus of plants commonly called horny goat weed because of their claimed aphrodisiac effects. Epimedium sagittatum is one particular species of this genus.

Swollen glands in the neck can have a variety of causes ranging from flu, mononucleosis, a tooth abscess or an infection of a salivary gland. Regardless of the cause, swollen glands are usually painful. Using home remedies to help reduce swelling and pain may be helpful in certain conditions.

Extract of black walnut forms part of a three-herb treatment for internal parasites. Black walnut leaves, hulls and nuts were used medicinally as long ago as the Roman Empire. Culpeper's Complete Herbal lists walnut as a treatment for much more than parasitic worms. Walnut also treats "green wounds,"

Ashwagandha is an Ayurvedic remedy claimed to be good for many conditions, including stress, fertility, depression and cancer, but there is inadequate data to prove its effectiveness, according to NYU Langone Medical Center. The roots, leaves and fruit of the ashwagandha plant are used medicinally.

Serotonin is a hormone that regulates mood, memory, learning, appetite, sleep and muscle contraction. If there is not enough of the hormone available for nerve cells, you may feel depressed and anxious.

The Mayo Clinic defines an essential tremor as a central nervous system disorder resulting in chronic shaking or rhythmic muscle spasms. These essential tremors may occur in nearly any portion of the body; however, the most common areas of shaking are isolated within the hands, head, arms or legs.

Tonsillitis is an inflammation or infection of the tonsils characterized by redness, swelling, inflammation, and pain in the throat. Other symptoms may include fever, chills, vomiting, swollen glands, muscle pain and lethargy. Tonsillitis may result from either a viral or bacterial infection.