Scalp psoriasis may also look like dandruff ... However, if they become infected, they may bleed and scab. Scientists don’t know for sure why some people get pilar cysts while others don ...

It can also be caused by infestations of lice or an infection called scalp ringworm. In rare cases, scabs that bleed and won't heal may be a sign of skin cancer. Dealing with scabs on your scalp ...