When you use different dyeing products for several months, your hair may be disturbed by color, resulting in uneven color or dry and fragile hair texture.
Therefore, it is recommended to consult the hair stylist before dyeing your hair, so as to ensure that they know about the hair dyeing products you used before, so that they can choose the color and formula suitable for your hair quality.
Generally speaking, if you want to keep your hair healthy and beautiful, you'd better consult a professional hair stylist before dyeing your hair, and choose a color and product that suits your hair quality and expectations.