Prevention of hair loss

Patient: Hi Doctor,I had a couple questions about hair care:1. What is is the most important reason to take care of your hair?2. What are some consequences of not taking care of your hair? What would be the most grave one?3. What are some common hair care routines that can cause these consequences?4. What can do to prevent them? Or what are some solutions to problems caused by not taking care of your hair.Thank you for your time.