Should i be concerned? (photos)

I have those pimple like this on my pubic area, its painless and it does not itch. i have only notice those little pimples surrounding big one only recently. The big one however has been there for few months (in which i thought it would go away itself), in which it hasnt. I think that may have been caused by a cut after i shaved area few months ago. I have had those similar one or two pimples before in different areas of my pubic, however after days of wash, it goes away.

No doctor answers yet