Monthomery gland accidentally poped out

Patient: Hi, am a 25 year-old female. While taking a shower I accidentally poped out a whitehead pimple on my nipple. I know it is a Monthomery gland, and that is a normal pimple. However, the one that popped out was very white and was very close to the skin surface, so it just needed a slight scratch, and it came out. The other pimples are deeper in the nipple tissue, and are hidden. Just I had this odd one. There was no blood, and in the place of the pimple a tiny hall is left now.Is there is anything I should worry about?Thank you very much!

Symptoms: No simptoms

Doctor: