The itchy skin on the neck may be due to the friction of the collar or allergy to the collar in the neck area, so the itchiness can be replaced as much as possible or the itchiness formed due to the reaction of cosmetics, timely replacement of cosmetics or stop the use of cosmetics. If it is still itchy, you can take oral antihistamines as appropriate. Generally, you can take second-generation oral antihistamines, such as loratadine and levocetirizine hydrochloride. If localized redness or erythema is formed due to contact dermatitis, topical glucocorticoid creams, such as hydrocortisone cream, should also be applied.