Detailed answer

Hair and scalp seborrheic keratoses are benign growths that occur due to a buildup of skin cells. They are not typically caused by allergies to skincare products. Allergies to skincare products may cause redness, itching, or irritation of the scalp, but they do not directly lead to the development of seborrheic keratoses. However, it's important to note that certain skincare products or their ingredients can potentially trigger skin reactions in individuals who are prone to developing seborrheic keratoses. If you suspect an allergic reaction to your skincare products, it is recommended to discontinue use and consult with a dermatologist for proper evaluation and treatment.