<prompt> Frequent blushing erethism is associated with : -MercuryLeadPhenolic acidCarbolic acid  <response>: MercuryMechanism of toxicity.Mercury reacts with sulfhydryl SH groups, resulting in enzyme inhibition and pathologic alteration of cellular membranes.Clinical presentation. Acute inhalationSevere chemical pneumonitis and noncardiogenic pulmonary edema.Acute gingivostomatitis may also occur.Chronic intoxicationClassic triadNeuropsychiatric disturbancesGingivostomatitis. Metallic tasteFrequent blushing erethism.Pain in the extremities,often accompanied by pinkish discoloration and desquamation pink diseaseReference Poisoning Drug Overdose by Kent R. Olson 3th- 213 