Types of urticaria are categorized into acute and chronic urticaria based on duration, and into spontaneous and induced urticaria based on triggers. Acute urticaria is characterized by the spontaneous appearance of winds or angioedema and lasts less than or equal to 6 weeks. Chronic urticaria is the recurring appearance of windmills or angioedema for more than 6 weeks. Spontaneous urticaria can be categorized into acute spontaneous urticaria and chronic spontaneous urticaria. Induced urticaria can be divided into 9 subtypes, with artificial urticaria, cold contact urticaria, delayed pressure urticaria, heat contact urticaria, solar urticaria, vibratory angioedema, cholinergic urticaria, waterborne urticaria, and contact urticaria. If you have urticaria, it is recommended that you seek medical attention in a timely manner, under the guidance of a professional physician for treatment, the use of drugs need to follow the doctor’s instructions, not blindly use their own medication, so as not to cause adverse consequences.