1 Pain that does not diminish with rest, and pain that may be worse at night than during the day. 2  Back pain along with constitutional symptoms, such as loss of appetite, unplanned weight loss, nausea, vomiting, or fever, chills or shakes.
Onions produce the chemical irritant known as syn-propanethial-S-oxide. It stimulates the eyes' lachrymal glands so they release tears. Scientists used to blame the enzyme allinase for the instability of substances in a cut onion.
1 Peel the outermost layer of the onion down to the root, leaving the root as is. 2  Lay the onion cut side down on the cutting board. 3  Then use a knife to section the onion into 16ths, beginning with your knife â-inch away from the root and cutting straight down.