The most common reason for the appearance of small red bumps on the chest is folliculitis, which is caused by excessive keratinization of the skin at the hair follicles resulting in embolism and sebum excretion disorders, and sometimes also has a relationship with hygiene, and it is necessary to pay attention to the need to keep the bed linen, bedding and intimate clothing clean, and don’t hang any ornaments on the chest. In terms of diet, you should eat less spicy and stimulating food, less greasy food, less sweets, and more food rich in vitamin A, C and fiber. Very few small red bumps on the chest are caused by allergic reactions, which can be treated with oral cetirizine, cyproheptadine or prednisone, and can be used externally with glycerite lotion. Pay attention to adjust the diet, avoid spicy stimulation, easy to cause allergic food.