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my right testical is like a little dark blue and a little bit of pain

my left hangs lower and than my right and my right has pain in it but not severe just noticeable

Common causes of testicular pain include: orchitis, epididymitis, varicocele, hydrocele or simply due to nerve irritation just below the ribs in the back may radiate pain into the groin and in your scrotum.
See doctor right away for diagnosis, as some may lead to complication later.