My cervix is pink, but whenever i open it, end part looks reddish. i itched last night(have psoriasis near cervix). when should i be concerned? visited gyn last month (had a few coccus), ill recheck in a week. didnt have redness then?

Were you treated for the cocci? Strep may colonize vagina - usually it is only an issue at the time of birth as it can be transmitted to the neonate. May be chronic or recurrent cervicitis-infection or psoriasis/inflammatory. Culture for strep / STDs , get PAP , f/u/w/ gyn https://my.clevelandclinic.org/health/diseases/15360-cervicitis https://pubmed.ncbi.nlm.nih.gov/1599269/

I think you are using the term "cervix" inappropriately, and your rash and itching may be due to psoriasis, for which treatment is available. I advise that you be examined by a trusted dermatologist. If psoriasis not the cause, a trusted gynecologist should provide an answer, since psoriasis does not "come and go."