This part of the body is very sensitive as it contains many nerve endings and this is the body's natural reaction to pain when physical stimulation is applied.
Erection of the nipple is caused by the contraction of muscle fibers inside it. In this case, it is a reflex response, formed in the process of evolution - when the baby touches the mother's nipple, it hardens, making it easier to feed.
My jaw clicks on the right side when I open my mouth. I can assume that this is due to the fact that I constantly chew gum. What to do and how to treat?