The following complications can occur in severe carbon monoxide poisoning: 1. The most serious is the emergence of poisoning delayed encephalopathy, carbon monoxide poisoning patients will appear dizziness, headache, transient loss of consciousness, etc., all belong to the serious carbon monoxide poisoning combined with delayed encephalopathy. 2. Severe carbon monoxide poisoning will also appear different degrees of cardiovascular disease, for example, patients will appear obvious chest tightness, shortness of breath, heart blood supply, or appear typical arrhythmia, etc. 3. The company’s main business is to provide a wide range of products and services to the public.