The presence of significant itching on the chest requires careful observation of the appearance of the skin in the chest area in order to determine what factors are causing it. If the itchy area appears obvious red small blisters, unilateral distribution, arranged in a band, it is considered that there may be a special type of herpes zoster, which is formed after infection with a virus, you can choose to use oral vasiclovir hydrochloride, topical recombinant human interferon gel for treatment. If the skin on the chest is dominated by erythema and papules, accompanied by hyperplasia, it may be eczematous dermatitis, which is related to allergy and irritation, and it is recommended to take oral loratadine tablets, and then apply hydrocortisone butyrate cream or mometasone furoate cream locally to carry out the treatment. If the chest area in the red papule above, can see white small pus head, itching symptoms is not very intense, consider the possibility of folliculitis, it is recommended to choose the topical application of metronidazole gel.