A lot of red spots on my body. What's going on?

There are a lot of small red dot symptoms on the body, one is: infectious molluscum, is the occurrence of viral infection; two is: folliculitis, is due to acne propionibacterium infection or pityrosporum bacteria caused; three is: eczema, is caused by allergies; occurrence of any of the above symptoms do not scratch the skin itching, so that skin ulceration occurs infection.