The small red dots on the chest area need to be judged according to the appearance of the small red dots and how exactly the factors are formed. If the red dots are flat against the skin, there is no obvious discoloration after pressing, and they also appear on the palm area, consider that it may be syphilis stage 2 rose rash, and suggest that blood tests for syphilis spirochetes be taken at a local hospital. If the growth of small red dots with mild raised, accompanied by obvious itching, left and right symmetrical distribution, consider that it may be allergic dermatitis, directly related to allergic factors and irritation factors. You can choose to use oral cyproheptadine or ketotifen and apply hydrocortisone butyrate cream topically for a good treatment. If a small red dot is raised on the skin, accompanied by painful pressure, it may be considered a folliculitis, caused by bacterial infection, it is recommended to take oral doxycycline or minocycline and topical metronidazole gel for treatment. In addition, flat warts, filiform warts, and subcutaneous bruises also tend to appear as small red dots.