What is "formications"

Usage examples of "formications".

In spite, however, of evidence called in her defence—as, for example, that of Dr Pitois, of Rennes, who was Helene's own doctor, and who said that ``the woman had a bizarre character, frequently complaining of stomach pains and formications in the head''—in spite of this doctor's hints of monomania in the accused, the jury, with every chance allowed them to find her irresponsible, still saw nothing in her extenuation.