Detailed answer

Allergies to skincare products are immune responses triggered by certain ingredients in the products. Dermoid cysts, on the other hand, are congenital abnormalities that result from the development of misplaced embryonic tissue. These cysts typically form in the deep layers of the skin and contain structures such as hair follicles, sweat glands, and oil glands. They are not caused by allergies or any reaction to skincare products. If you suspect you have a dermoid cyst on your hair or scalp, it is recommended to consult a medical professional for accurate diagnosis and appropriate treatment.