1. Maka ihe otutu na-adịghị mma, ichthyosis na psoriasis na-adịghị mma
2. ọgwụ mgbochi keratosis.
3. A makwaara dị ka retinoic acid na retinoic acid, eriri a bụ ihe na-emepụta ihe na-emepụta vitamin A n'ime ahụ, nke na-emetụtakarị uto nke ọkpụkpụ na metabolism nke mkpụrụ ndụ epithelial, ma nwee mmetụta nke ịkwalite mgbasa nke cell epithelial na keratolysis. .