Detailed answer

Dermatofibrosarcomas are rare soft tissue tumors that typically develop in the deeper layers of the skin. Allergies to skincare products, on the other hand, are an immune response to certain ingredients in the products and manifest as skin irritation or rashes. Allergies do not cause the development of tumors like dermatofibrosarcomas, which have a different underlying cause, often related to genetic mutations. It's important to consult with a dermatologist if you suspect any changes or abnormalities in your hair or scalp, as they can properly diagnose and treat any concerning conditions.