Washing your hair with cold and lukewarm water makes the hair strong, reduces hair loss and hair breakage.
Hot water reduces moisture content and weakens the strands of the hair. This makes the hair vulnerable to breakage. On the other hand, lukewarm water opens the pores of the scalp while washing the hair while cold water closes the cuticle, which helps to reduce frizz and hair loss.
Closed hair pores are less vulnerable; this protects the scalp from grease, oil and dirt. Sealed hair pores make the hair stronger and reduces the likelihood of thinning hair.