Can wearing a swim cap or not wearing one cause hair loss?

Thank you for your question.  While constant contact with chlorine may not be the healthiest option for hair since it may cause drying out and thinning of hair, the consistent pulling from a tight fitted swim cap can also trigger a hair thinning called traction alopecia.  Be sure to keep hair hydrated and conditioned.  You should speak to your doctor about the best options.

You would have to wear it for long periods pretty much daily for it to have any substantial effects on your hair, assuming it was pulling hard enough. If the pulling only happens as you put it on and not indefinitely while you wear it then I doubt it's going to have a long term impact.

Good question. Congrats, you are in the right track for hair loss treatment. No, swim caps don't produce hair loss. Also I recommend my patients to use it for swimming.