The present invention concerns a combination of a retinoid and a diol and polyunsaturated fatty acid ester, a dermatological or dermocosmetic composition containing such a combination and use of same in the treatment of acne and the prevention of retentional lesions. The present invention also concerns a retinoid, optionally in combination with a diol and polyunsaturated fatty acid ester, for use in the prevention of retentional lesions.