Hello Doctor, This Is Padhma From Karaikal. I've Used Tea

Hello Doctor, This is Padhma from Karaikal. I've used tea tree oil for my acne skin.. Already I've acne and acne scars on my face. after using tea tree oil it became very darken and pimples also coming newly. some times feels like itching. Is it allergy or any other problem? Please help me....