Tretinoin 0.025% cream is commonly used to treat acne and improve skin texture, including some types of acne scars. However, its effectiveness on older scars, such as those 4-5 years old, depends on the scar type and severity.

• How Tretinoin works: It promotes skin cell turnover and collagen production, which can help fade discoloration and improve mild scarring.
• Limitations: For deep or pitted scars, tretinoin alone may not be sufficient to fully remove them.
• Additional treatments: Sometimes, combining tretinoin with other procedures like chemical peels, microneedling, or laser therapy provides better results for older scars.
• Usage advice: Use tretinoin under medical supervision, as it can cause skin irritation, especially when starting treatment. Also, avoid sun exposure and use sunscreen to protect your skin.

If you have persistent or severe scars, consulting a dermatologist is the best step to get a tailored treatment plan that may include tretinoin and other options for optimal improvement.