When red dots appear on the neck, you need to carefully observe the appearance and self-conscious symptoms of the red dots to determine how the factors are formed. If such red dots are flat against the skin, have no obvious conscious symptoms, and appear in other areas, you need to go to a local hospital to have a blood test for syphilis spirochetes to rule out a rose rash caused after syphilis infection. If the red spot has a clear bump accompanied by mild itching, consider the possibility of allergic dermatitis caused by simple allergic factors, you can choose to use oral loratadine tablets and then apply topical Denide cream for treatment. If clear blisters and crystals are seen on top of the red spots and accompanied by fever and headache, the possibility of early chicken pox needs to be ruled out and a blood test can be done to clarify the diagnosis. If the red spot is caused by friction or squeezing, don’t worry too much, it will fade quickly on its own with time.