dandruff, irritation, or scalp infections.Hair Weakness
Wet hair is more fragile and prone to breakage. Rubbing it against the pillow during sleep can damage it, causing split ends and breakage.

Respiratory Problems
While there’s no direct evidence that sleeping with wet hair causes colds, some studies suggest that prolonged exposure to moisture could contribute to discomforts like sore throats or sinusitis in predisposed individuals.