No, hot showers do not cause hair loss. But extremely hot water can damage keratin, the protein that makes up hair strands. It may also strip away the natural oils that keep your scalp and hair healthy., If your hair is already dry or damaged, washing it in hot water can make it more likely to break., To avoid damage, use lukewarm water instead of hot, avoid brushing and stretching your hair while it’s wet, and use a deeply moisturizing conditioner regularly.