Rubbing a towel over wet hair can cause damage to the hair and make it more prone to breakage. When hair is wet, it is more vulnerable and fragile, and the friction caused by rubbing with a towel can cause the hair cuticles to lift and break, leading to split ends and damage.
It is generally recommended to avoid rubbing hair with a towel and instead gently pat it dry or use a microfiber towel or t-shirt to gently squeeze out the excess water. This will help to prevent damage and breakage and leave hair looking and feeling healthier.
Allowing hair to dry naturally can be a good way to help it get stronger, as it reduces the amount of heat and friction that hair is exposed to. However, it is important to note that excessive or prolonged exposure to moisture can also cause damage to the hair, so it's a good idea to gently blot the hair dry and then allow it to air dry in a well-ventilated area.
It's also important to take care of your hair overall by using gentle shampoos and conditioners, avoiding harsh chemical treatments or excessive heat styling, and using protective products such as heat protectant sprays or leave-in conditioners to help keep hair healthy and strong.