Here are some advices that has been recommended by hair care professionals:
1. Avoid washing your hair too often. Bleached hair is already prone to dryness and breakage, so washing it too often can strip away any remaining natural oils and make the problem worse.
2. Use a sulfate-free shampoo and conditioner. Sulfates can be harsh on already-damaged hair, so it's important to use a gentle, sulfate-free formula.
3. Deep condition regularly. To help restore moisture and prevent breakage, use a deep conditioning treatment at least once a week.
4. Protect your hair from heat. Bleached hair is more susceptible to damage from heat styling tools, so be sure to use a heat protectant spray and/or minimize your use of high-temperature styling tools.
5. Avoid chlorine. Chlorine can cause bleached hair to turn green or yellow, and it can also cause further damage and dryness. If you plan to swim, be sure to wear a swim cap or apply a protective product beforehand.
6. Trim your ends regularly. To prevent split ends and further breakage, it's important to get regular trims, preferably every 6-8 weeks.
7. Be gentle when brushing and styling. Use a wide-tooth comb or a brush with soft bristles to avoid damaging your hair further. Avoid pulling or tugging on your hair, and be careful not to yank out any knots or tangles.