Digitalis toxicity is manifested as follows: 1. Patients will have gastrointestinal reactions, including nausea, vomiting, acid reflux, heartburn, abdominal pain, diarrhea, mainly colic around the navel, and dilute watery stools or mucopurulent stools. 2. Patients will also have neurological lesions, such as dizziness, headache, drowsiness, dizziness, etc. 3. Patients will have visual changes, such as blurred vision, unclear vision, yellow vision, green vision, diplopia, etc. 4. 4. Patients may have obvious cardiac arrhythmias, such as frequent premature ventricular beats, atrioventricular block, tachyarrhythmias, duplex and triplex rhythms, which are typical arrhythmias of digitalis poisoning. 5. Patients with digitalis poisoning may have obvious changes of hyperkalemia.