It sounds like tretinoin may have caused irritation or increased pigmentation under your eyes, which can sometimes happen.

1. Understanding Under Eye Dark Circles and Tretinoin Effects

   • Tretinoin is a strong retinoid that can sometimes cause irritation or inflammation, leading to temporary darkening of sensitive skin areas like under the eyes. This reaction may worsen pigmentation instead of improving it.

2. Alternative Treatments for Under Eye Dark Circles

   • Consider gentler topical options such as:
     • Vitamin C serums: Help brighten skin and reduce pigmentation.
     • Niacinamide: Known for its anti-inflammatory and skin-lightening properties.
     • Mild hydroquinone formulations (used cautiously and under supervision) can reduce pigmentation.
   • Natural remedies like cold compresses, adequate sleep, and hydration may also help improve dark circles.

3. Importance of Patch Testing and Dermatologist Consultation

   • Always perform a patch test on a small skin area before applying new products under the eyes to avoid adverse reactions.
   • It is important to consult a dermatologist who can assess your skin type and recommend a personalized, safe treatment plan.

4. Additional Care Tips

   • Use broad-spectrum sunscreen daily to protect the delicate under-eye skin from UV damage.
   • Follow a gentle skincare routine avoiding harsh scrubs or irritants around the eyes.

Please consult a dermatologist to explore the best and safest options tailored for your skin.

  
Would you like to know more about natural remedies and lifestyle changes for dark circles?