PREVIOUS QUESTION:

 

NEXT QUESTION:

 

How is the hair loss cycle divided?

ANSWER

At any one time, about 90% of the hair on a person's scalp is growing. Each follicle has its own life cycle that can be influenced by age, disease, and a wide variety of other factors. This life cycle is divided into three phases:

As people age, their rate of hair growth slows.

  • Anagen -- active hair growth that lasts between two to six years
  • Catagen -- transitional hair growth that lasts two to three weeks
  • Telogen -- resting phase that lasts about two to three months; at the end of the resting phase the hair is shed and a new hair replaces it and the growing cycle starts again.

SOURCES: 

American Society for Dermatologic Surgery. 

American Academy of Family Physicians.

Reviewed by Stephanie S. Gardner on October 13, 2017

SOURCES: 

American Society for Dermatologic Surgery. 

American Academy of Family Physicians.

Reviewed by Stephanie S. Gardner on October 13, 2017

NEXT QUESTION:

What is involutional alopecia?

WAS THIS ANSWER HELPFUL

THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.

    This tool does not provide medical advice. See additional information.

    Other Answers On: