* Formula: Nude lipsticks are formulated for lips, which have different needs than the skin under your eyes or on your face. They tend to be more emollient (moisturizing) and might contain ingredients that are too heavy or greasy for the delicate skin around your eyes.
* Pigment: The pigment and color payoff of nude lipstick might not be ideal for concealing. It could be too sheer to cover blemishes effectively, or the undertones might not be right for neutralizing discoloration like dark circles.
* Texture: The texture might be too thick or slippery, causing the product to crease or slip off easily.
* Hygiene: Applying lipstick directly to blemishes or skin concerns and then back onto the lipstick can transfer bacteria.
* Color matching: Finding a nude lipstick that perfectly matches your skin tone and addresses specific concerns like dark circles can be tricky.
What's better to use
It's best to use a product that is formulated as a concealer. There are many different types and colors of concealers for different skin tones and concerns. For example, to conceal dark circles you would use an orange color corrector, and then use a concealer that is close to your skin tone.