Using scissors that are not sharp enough can cause split ends, and they are further up the hair than the split or white dot you were trimming off to begin with. Maybe purchase another pair of hairdressing scissors?
Having said that I do trim my hair with kitchen scissors, but I know mine are high quality and super sharp. I wouldn't ever use my nail scissors, they were blunt to begin with and more so after cutting tough nails.
2a-2c, medium texture, porous/ colour treated. Three years CG, growing out mechanical and chemical damage = breakage and very high porosity. Past armpit length heading for waist.
Treatments: Komaza protein, Komaza Matani, coconut oil with sugar syrup. Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss ultimate volume
Styler: Umberto Giannini jelly, Boots curl creme, Rockin RInglets
Experimenting with: Mega-Tek, Curl Harmony reviver, Elvive Full Restore 5.