There is a difference between white dots and split ends but a white dot can result in a split end. Mine do not since my catnip use has improved, from a good while back. I know my white dots are from mechanical damage. I have found hairs with more than one white dot on them, from the hairs catching, and my not having done an s&d in a while.
When I was recently briefly, experimenting with catnip "shampoos", and then a catnip treatment, and the treatment was not being absorbed into my hair as well as following conventional shampoo, I was just starting to see split ends again and my hair was knotting. Since going back to my regular routine, of conventional shampoo followed by the catnip treatment, I have not seen any split ends. I think the difference is a matter of dryness. Catnip as a treatment, bagged and timed, keeps my hair balanced with moisture and protein and breakage does not result in my ends getting more frayed and split.
A white dot is actually breakage that can but not always, result in a split end. I still get a few white dots but they do not result in split ends (I have found them between long times between s&ds and they have not resulted in split ends) and I used to get split ends, with no white dots on them.
"Hair disordersSymptoms of hair shaft disorders are split ends and hair that is dry, brittle, and coarse, as well as skin and other abnormalities."
"Trichorrhexis nodosa is a defect in the hair shaft characterized by thickening or weak points (nodes) that cause the hair to break off easily.... The hair actually grows but is broken before it can become long. .... the defect often appears at the ends of the hair shaft with splitting of the ends, thinning and whitish discoloration. .... This condition is self-limiting. Improvements in grooming techniques and in environmental conditions will correct the abnormality."
"Definition of Trichorrhexis nodosa:
Trichorrhexis nodosa is a problem in which thickened or weak points (nodes) along the hair shaft cause your hair to break off easily. .... Causes, incidence, and risk factors: Your genes may play a role in whether or not you develop trichorrhexis nodosa. Certain things you do to your hair -- such as blow-drying, over-brushing, perming, or excessive chemical use -- appear to trigger the condition. In some cases, trichorrhexis nodosa may be caused be an underlying disorder such as hypothyroidism, argininosuccinicaciduria, Menkes' kinky hair syndrome, Netherton syndrome ...."
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