If my hair is dyed before, can i still dye my hair? I dyed my hair about a year ago, at the end of this year im planning to change my hair colour by dying it into another colour. Will my hair be more damage? Can I do something to prevent my hair from more damages?
Yes, you can dye it again. I'm not really an expert on the subject, but I've heard that getting it professionally done is healthier for your hair than buying a box and doing it at home. I think that as long as you aren't bleaching it, it should be okay if your hair isn't already fried. I re-dyed my hair (that was already kind of damaged) with box hair dye for years when the roots grew out and it didn't hurt it too bad.
Of course you can dye your hair again and of course there will be more damage.
You can't prevent the damage from happening but you can help. Like going to a professional instead will definitely assist you than doing it from home. Also looking about deep conditioning treatments for colored treated hair and utilizing them should also work.
Dying how? Are you bleaching first or just dying? And if no bleach, what type of dye?