Itchy bumps on the chest may be due to folliculitis, eczema, hives and other diseases. 1. Folliculitis: usually caused by bacterial or fungal pathogens, and also associated with excessive sweating, acne, skin trauma, wearing tight clothing, sedentary, obesity and other factors. Patients often appear to follicle-centered red papules, some patients can also be accompanied by itching, tenderness and other symptoms, which can also be manifested as itchy bumps on the chest. 2. Eczema: the cause of the disease is not clear, usually with genetic, immune abnormalities, endocrine and metabolic diseases, chronic infectious foci and other factors. Eczema can also be triggered by mental, dietary habits and inhalants. Patients often appear local erythema, edema, papules, papules, etc., and acute eczema patients can also be accompanied by intense itching, blisters, oozing and other symptoms, but also can appear on the chest itchy with small bumps. 3. Urticaria: usually associated with drug and food allergies, infections, medications, systemic diseases, mental stress, physical factors, immune function abnormalities and other factors. The patient will often appear local air masses or angioedema, mostly accompanied by itching, which can also appear on the chest itching with small bumps phenomenon. In severe cases, abdominal pain, fever, nausea, chest tightness and other systemic symptoms can also occur. It is recommended that patients with symptoms of itchy bumps on the chest, timely medical examination, and after clarifying the cause of the disease, follow the doctor’s instructions for specific treatment.