For the past few months, there's some kind of fungus or dandruff develop on my hair. I don't know whether it's a dandruff because I am feeling little pain and sometimes itching. I never had dandruff and this thing happens when I put one of my helmet and I had stopped using that helmet as well. Nowadays I am not travelling anywhere due to the corona virus, I have been staying at home and in the past whenever I don't use the same helmet, it was fine. But this time, it hasn't gone away and this fungus thing is hurting my scalp and it makes my hand to touch it frequently and scratch it. So please suggest me the proper medication to stop this fungus to develop on my scalp.