According to Baidu Health, the hazards of long-term use of Vitex negundo pillows are:

1. Skin irritation: Vitex negundo is warm, which can dispel dampness and dispel cold. When the patient's neck is stimulated by cold, the pillow Vitex negundo can be used to dispel dampness and cold and relieve pain. Vitex negundo is hard. If the medicinal materials are not properly cleaned when making the Vitex negundo pillow, or the cloth used to make the Vitex negundo pillow is rough, long-term use may irritate the skin, resulting in itching, redness, tingling and other symptoms of the skin.

2. Induce allergic reaction: If the patient is allergic to Vitex negundo, long-term use of Vitex negundo pillow may induce allergic reaction, which may lead to various types of rashes, such as erythema, papules and herpes mound. , accompanied by itchy and stinging skin. In this case, patients are advised to seek medical treatment in time, and under the guidance of a doctor, topical antiallergic ointments such as hydrocortisone butyrate cream and mometasone furoate cream are used for treatment.