Sudden red bumps on the body without itching may be caused by folliculitis, cherry angioma and other diseases, the patient should consult a doctor in a timely manner to clarify the cause of treatment. 1. Folliculitis: sudden red bumps on the body without itching may be caused by folliculitis, the cause of which is generally associated with bacterial infections, folliculitis on the back of the chest may also be associated with Malassezia infections, there will be a hair follicle as the center of the red pimples, which may be accompanied by pain or itching, and some of them do not have any self-awareness of the symptoms. 2. Cherry angioma: also known as senile angioma, associated with capillary proliferation and expansion. It will suddenly appear red bumps of different sizes without pain or itching. Sudden red bumps without itching may also be related to other diseases, it is recommended to consult a doctor in time to clarify the cause of the disease.