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Many people with darker hair may bleach or otherwise dye their hair at a salon. Before making a decision about dyeing your hair, talk to the hair stylist about potential damage.  If you're going platinum, there will be inevitably be some damage to your hair. A stylist may even refuse a platinum bleaching if your hair has been color treated previously as the damage could be more significant.  Talk to your stylist about how you want to lighten your hair. He or she can evaluate your hair's current condition and decide what color treatment will provide the least amount of damage. Damage caused by bleaching and dyeing is worse when it's close to your scalp and follicles. You should let your roots grow out at least a half an inch before getting a touch up. This can help minimize damage. Hair grows about a half inch per month on average, though this can vary by person and time of year. This means that it’s best to get a touch up every 4 to 6 weeks. Salon-dyed hair with professional products is probably the best way to go – it uses less harsh chemicals than at-home treatments. If you dye your hair at a salon, though, it may still need extra care afterwards. Talk to your stylist about how to give your hair extra TLC after dyeing.  Ask your stylist for recommendations for moisturizing conditioners and other at home treatment options. Hair dye can cause hair to be dryer than normal.  Consider a pre-wash primer before washing your hair. This can help block water, making a dye job last longer.  Consider coconut oil or protein-based conditioners. These can help fix damage done to hair via dyeing and bleaching.

Summary:
Talk about potential hair damage. Leave your roots alone. Take extra care of your hair after dyeing.