The reason for this is that you may be nervous, scared and fearful of everything, which may be caused by anxiety disorders, mental disorders, physical diseases and special medications. It is recommended that after such discomfort, you go to the hospital in a timely manner to seek medical attention and treat the symptoms after a clear diagnosis.1. Anxiety disorders: the etiology of anxiety disorders is complex and is the result of a combination of physiological, psychological and social factors, usually manifested as symptoms such as nervousness, uneasiness, fear, dread, increased heart rate, sweating, shivering and worrying. Usually for anxiety disorders, you can choose psychotherapy, including cognitive-behavioral therapy, supportive psychotherapy, biofeedback therapy, etc., as prescribed by your doctor. Medications can also be taken under medical supervision for treatment, including benzodiazepines, antidepressants, such as eszopiclone, promethazine hydrochloride, etc.; 2. Psychiatric disorders: schizophrenia, obsessive-compulsive disorder, and other psychiatric disorders may also lead to nervousness, fear, and dread in everything. Schizophrenia refers to distortions in an individual’s consciousness, feelings, perceptions, and behaviors, and is usually triggered by a combination of brain structure, acquired environment, etc. For patients with schizophrenia, medication is often effective when taken according to medical advice. First-generation antipsychotic drugs such as fenadine and pentoxifylline can be used, as well as second-generation antipsychotic drugs such as domperidone, lurasidone hydrochloride, brunanserin, etc., or twitch-free electroconvulsive therapy, etc.; 3. Physical diseases: heart disease and respiratory diseases can also cause nervousness, fear and dread. Heart disease is often due to family inheritance or congenital defects, genetic mutations, etc., or due to hypertension, diabetes, ageing, bad habits, etc.. Medications can usually be taken, such as antihypertensive drugs including furosemide, propranolol hydrochloride, etc., hypoglycemic drugs including gliclazide, metformin, etc., and anticoagulant drugs including aspirin, warfarin sodium tablets, etc. Surgical treatment usually includes coronary artery bypass grafting, pacemaker implantation, defect closure, etc.; 4. Special medication: certain sedative-hypnotic drugs can also cause nervousness and produce fear and dread, such as benzodiazepines, diazepam, etc., which can cause excitement and restlessness and emotional instability at high doses. Non-benzodiazepines, Zaleplon, etc., can cause adverse reactions such as headache, dizziness, depression, and confusion after taking them. If adverse reactions occur after the use of drugs, you should seek medical attention to prevent serious consequences.