I dreaded the word "trim" for the longest time. I have always wanted long hair and since I thought my hair was growing slowly, I hated trimming my hair.
Unfortunately, since hair is always touched, there is bound to be some kind of damage(no matter how minimal it is). Time, the elements, grooming techniques, hygral fatigue and a lot more can contribute to the weathering of the hair shaft. Take a look at your individual twist or braid, you will notice that the ends are thinner than the roots and middle. That's because the ends are old and have been through a lot of handling and exposure to damaging elements like adverse weather.
The ends can end up being split and if this is not corrected the the split hair will split all the way down the hair shaft and break off eventually. The best thing to do is to trim the split ends.
So the question is, how often should you trim your hair? Personally, I do not believe in regular trims(for example, every 6 weeks or so). I just do not believe that you can grow longer hair if the hair is trimmed on a regular basis. If you are taking care of your hair and the ends are not damaged, why would you commit yourself to trimming your ends that you have worked so hard to retain? Does that make any sense?
This is my opinion, I am not an expert but I believe that trimming should be done when it is needed. I trimmed my hair back in October due to my dry colored ends. My ends(still colored) were kind of looking thin again so I did another trim on January 8th. This time around, I did not trim as much as the last time. I only looked for the hair that needed to be trimmed. So that's a duration of about three months. Now, I am not on a schedule to trim my hair every three months, but if the ends are easily breaking and are very thin, then it's time for another trim.
What about you? Do you trim your hair, why do you trim your hair and how often do you do it?