In general, you should wait at least about 2 weeks before redyeing your hair, with many professionals recommending 4–6 weeks for color maintenance or if your hair is particularly damaged. If the previous dye was very harsh or your hair feels dry or brittle, waiting closer to 6–8 weeks may be wiser to minimize further damage. For semi-permanent dyes or color-depositing products, the risk of damage is lower, but it’s still best to follow timing guidance for the specific product you used. Key considerations

• Hair health: Damaged or overprocessed hair needs more time to recover before another chemical treatment.
• Dye type: Permanent/demi-permanent dyes typically require longer intervals than semi-permanent formulas.
• Color goals: If you’re correcting a mistake or changing shades substantially, you may need a consult with a professional to plan the safest approach.
• Maintenance vs. rest: If maintaining a color, many stylists suggest touch-ups every 4–6 weeks, but still allow for a 2-week minimum before attempting another full dye.

Practical tips

• Do a strand test or consult a professional if you’re unsure about the health of your hair after the previous dye.
• If you must refresh color sooner, consider safer options like semi-permanent dye or color-depositing conditioners that are designed to deposit color without lifting the base shade.
• Prioritize deep conditioning, avoiding heat styling, and using products suited for color-treated hair to mitigate damage while you wait.

If you share the type of dye you used (permanent, demi-permanent, or semi- permanent), your current hair condition (dry, brittle, healthy, bleached, etc.), and your color target, the guidance can be tailored more precisely.