If you have white spots on your fingernails or toenails, you might be wondering why, and whether or not it's a cause for ...

Arsenic poisoning. Rarely, arsenic poisoning can be a cause of white spots on the nails, Lipner says. If heavy metal poisoning with arsenic or thallium is to blame, ...

The hair contained 4.2 mg. of arsenic per 100 gm., and the nails 9.7 mg. per 100 gm. of nails. Findings on roentgenograms of the chest and abdomen and of an intravenous pyelogram were normal.

Arsenic poisoning can cause nausea, vomiting, diarrhea, weakness and headaches ... Wash hands and face after being outdoors; use a scrub brush to remove dirt under nails.

Naturally abundant in the environment and highly toxic, arsenic is present at unsafe levels in the water of around 140 million people in at least 70 countries. CNN values your feedback 1.