Generally, during the growth phase, hair grows up to one centimeter per month, and this growth continues for several years until new hair replaces the old. This cycle repeats itself. The cycle of hair shedding and regrowth depends largely on your genetics. Let us explore, then, how accurate it is to link hair trimming directly to hair growth.

**Trimming Makes Hair Look Manageable**
If hair becomes damaged due to factors like heat styling, weather, diet, or hormonal issues, it continues to grow in that damaged state. Trimming such hair makes it look much better, creating the illusion that the cut itself has made the hair healthier and thicker.

**So, Should You Skip the Cut?**
Experts believe that while trimming may not have a direct link to the rate of hair growth, it is certainly related to managing damage. Getting a trim every 8 to 12 weeks helps gradually reduce damage and prevents it from spreading to the ends of the hair. Additionally, if you wish to alter your hair's texture, getting it trimmed every 12 to 16 weeks is advisable.

**Possible Reasons for Reduced Hair Growth**
Of course, the rate of hair growth can vary from person to person. However, hair growth speed can be affected by the following factors:

Genetics
Nutritional deficiencies
Thyroid issues or hormonal imbalances
Low levels of vitamins and minerals such as B12, Vitamin D, and Zinc
Stages of hair growth:
Anagen: The active growth phase where hair grows
Catagen: The phase where hair growth slows down
Telogen: The resting phase where hair does not grow for a few months
Exogen: The phase where new hair emerges, naturally replacing hair that has shed

Why do some hairdressers cut off more hair than necessary?
Many people complain that hairdressers cut off far more hair than requested. Sometimes this happens by mistake, while at other times, hairdressers do it intentionally because they consider themselves experts in their field and believe their judgment regarding the length is correct.

What the experts say
A Professor of Dermatological Science at University College Dublin explains that hair growth originates from follicles embedded 2–4 mm deep within the scalp's skin. Hair fibers form inside each follicle before the hair even becomes visible on the surface. The hair you cut consists of dead, hardened tissue; therefore, cutting the hair above the surface does not significantly affect the processes occurring beneath the skin.

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