What Is the Difference Between an Ingrown Hair and a Boil?

As we all know, if you do n’t cut your hair, it will grow longer. It is determined that the hair growth rate is 0.3-0.4 mm per day. According to this calculation, hair is about 1-1.5 cm long in a month and about 10 cm in a year. If you grow at this rate, your baby's hair will be at least 1 meter long from birth to 10 years old, and will reach 2 meters by 20 years old. However, this is not the case. Hair is not always long, and hair growth has a certain periodicity, just like the process of life, oldness, illness, and death in a person's life. Not all of the hair on the head has active vitality, a large part is alive, and a small part has died, but is still "dying and struggling" on the scalp or in the hair follicles.