Patients who appear to be itchy when they are nervous may be caused by cholinergic urticaria, pruritus, neurodermatitis and other diseases. 1. Cholinergic urticaria: cholinergic urticaria is caused by peripheral nerves release acetylcholine skin disease, mainly manifested as small and itchy dots, mostly in the movement, nervousness, emotional fluctuations, drinking hot food after the onset of the patient is nervous and itchy may be caused by this disease. 2. Pruritus: Pruritus is a common skin disease that only has itchy skin without primary lesions, which mainly manifests itself as generalized or localized itchiness, when the patient is nervous and itchy all over the body may be caused by pruritis. 3. Neurodermatitis: neurodermatitis is a class of chronic skin disease, its main clinical manifestations of paroxysmal intense itching, often in local stimulation, mental stress, irritability, exacerbated. It is recommended that patients seek timely medical examination, clear causes for targeted treatment, pay attention to the care of the affected area in life, avoid scratching, friction and so on.