Red spots on the chest without pain or itching may be caused by eczema, spider nevus, cherry angioma and other causes. 1. Eczema: the cause of the disease is still unclear, mostly considered to be related to heredity, immune abnormalities, chronic infectious foci, female hormone level changes and other factors. Generally, patients in the acute stage will often be manifested as erythema, edema, chestnut-sized papules, etc., and can also be accompanied by vesicles, oozing, some patients may also appear itching, scaling and other phenomena. 2. Spider nevus: It is mainly a vascular nevus formed by the expansion of the end branches of small arteries in the skin, which is usually considered to be related to estrogen level and impaired liver function and other factors. Patients often appear in the neck, face, upper chest, back of the hand and other parts of the body, if the use of firewood sticks, cotton swabs and other pressure on the center of the spider nevus, the small blood vessel network immediately disappeared, which can also be manifested as a long red spot on the chest does not hurt and does not tickle. 3. Cherry angioma: it is mainly caused by the proliferation and expansion of skin capillaries, and its etiology is still unclear, and it is mostly considered to be related to gene mutation and aging. Patients will often manifest as round or ovoid red papules or nodules, and may also appear as long red dots on chest without pain or itching. It is recommended that patients with symptoms of itchy red dots on the chest should go to the hospital in a timely manner to clarify the cause of the disease and cooperate with the doctor to take reasonable treatment measures.