What is that sebum maybe ??

[adnan1995]

during the last months i have often hairs that i shed or when i wash my hair that come out with this bulb my question is is this sebum because if i pull down the ball i have the white bulb under it so it means that the hair is not in the anagen phase ??Will it grow back and the thing was that i had dandruff but with a shampoo i could clean my scalp but i lose every day like 5 hair with the fat end