Inhalation poisoning can cause harms of monomethylamine. Cough, expectoration, chest tightness, shortness of breath, cyanosis, laryngeal edema, pulmonary edema, and suffocation, atelectasis, and lung infections due to the harm of bronchial mucosa. Wait. A small number of critically ill patients have brain, heart, liver, kidney and other multiple organ damages due to subcutaneous emphysema, mediastinal emphysema, acute respiratory distress syndrome (ARDS), and severe respiratory dysfunction.

　　Skin burns Most acutely poisoned patients have different degrees of chemical skin-methylamine burns, which are more common in the exposed parts of the skin. The burned skin is dark red, similar to strong alkali-like burns. Patients with large-area skin burns should be wary of percutaneous absorption of monomethylamine aggravating systemic poisoning.