What's with the red spots on my back?

A lot of red spots grow on the back. If there is itching, this may be caused by skin allergy. Secondly, it may be folliculitis caused by hair follicle blockage. Of course, the possibility of dermatitis is not ruled out. Secondly, eczema also has a certain relationship. If the symptoms gradually worsen, it is recommended to seek medical treatment in time.