When the hair is damaged (limp, lustreless, won’t hold a perm or color, etc.) it may be that the scalp is tight from tension which causes poor circulation. The tightness of the scalp could mean that the hair bulb is not receiving the nutrients it needs to produce healthy hair. It atrophies or there is improper formation of the cuticle, weakening the hair shaft (causing breakage).
Damage may also be caused by harsh shampoos, alkaline bleaching agents, lack of conditioning, hot hair dryers or rollers, wind blowing the hair in an open car. Going out of doors in the winter without covering the hair can disrupt its moisture level. In the summer the hair can actually get sunburn damage. Other causes of damage may be overly zealous brushing, improper use of brushes or combs, habitually pulling the hair back in a ponytail or chignon, rubbing the hair too vigorously or certain nutritional deficiencies.
First of all, see that you eat a balanced diet, then learn how to protect your hair. The hair should first be trimmed, as long hair is weaker. Then intensive conditioners should be used to help fill in the lost patches of cuticle and repair the split ends. The protein is absorbed by the hair and each strand is then thicker. The conditioners encourage the hair to hold moisture, soften dry and brittle hair and make it more supple and resistant to breakage. This may need to be done for several weeks, ask your hairdresser for her advice.
At home, wash and rinse the hair with lukewarm water, hot water makes the hair swell and cold makes it limp. Rinse the hair before shampooing, and apply the shampoo first to your hand and not directly onto your scalp. Massage your scalp gently to promote circulation and ease tension. Blot and pat the hair dry but do not rub. While the hair is wet, comb it out with a wide-toothed comb. Use low heat to dry and avoid the use of hot rollers, elastic bands, overteasing.