Detailed answer

Undifferentiated pleomorphic sarcomas are rare malignant tumors that originate from connective tissue, and they are not caused by allergies to skincare products. Allergies to skincare products usually result in localized skin reactions such as rashes, redness, or itching, but they do not lead to the development of sarcomas. The causes of undifferentiated pleomorphic sarcomas are still not fully understood, but they are believed to occur due to genetic mutations or exposure to certain carcinogens. If you suspect any unusual growths or changes in your hair or scalp, it is important to consult with a medical professional for proper evaluation and diagnosis.