An 8-year-old girl showing signs of breast development before the age of 7 may be experiencing precocious puberty. The nipple on the left breast is protruding, which could be a sign of precocious puberty. It’s recommended to have the child tested for sexual hormones at the hospital and to avoid feeding them fried and puffed snacks. The breast pain may be due to a temporary increase in estrogen levels, which should improve over time. There is no need for medication treatment. Some girls develop earlier, which is normal and nothing to worry about.