Hello Doctor, My Name Is Jenny, And I'm 18 Years

Hello doctor, my name is Jenny, and I'm 18 years old.
I have inverted nipples on both my breast, but the left one is blocked and there are no signs of pain, tenderness or sore. I tried to search it online to see if there are others with the same problem but I couldn't find any. They have been like this since my breast started developing(puberty) so I have no problem with the inverted nipples, but I am concerned about the blocked. I'm not sure if this is life threatening or not.