7. Seborrhea Dermatitis
Last but definitely not least, this sneaky cause of hair loss can be extremely itchy! Seborrheic Dermatitis is a harmless skin condition occasionally found on the scalp, presenting itself in small red patches. This condition is caused by an inflamed scalp and hair loss can be alarming, with large patches lost unless treated properly. Fortunately, treatment is available, so just like psoriasis, you can speak to your doctor for advice.