We had a cat who did this and it was a psychological issue, it stemmed from nervousness, I think we started giving her more attention and not letting the other cat dominate her as much, the problem then resolved itself.

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2C, Medium thickness, Low posity
Recovering from a year of keratin and bleach with CG

Routine

Low Poo, Condition, Leave in, Curl cream, Supersoak, Gel, Diffuse on high heat, with minimal lift to encourage waves and reduce frizz, Dry on cool with nozzle down to smooth hair and finish drying,Shine Serum

Weekly gelatin protien treatments.