4. Fungal infections
Next on our list of serious diseases that cause severe hair loss is fungal infection. Fungus is no fun when it’s growing in your shower, and it’s certainly no fun when it’s growing on your scalp.
Scalp fungus (also known as tinea capitis) is a fungal infection that affects the scalp. It also goes by the somewhat alarming names ringworm and herpes tonsurans.
The main culprits behind this contagious condition are the dermatophyte species Trichophyton and Microsporum. These fungi infiltrate the outer root sheath of your hair follicles and can sometimes even make their way into the hair shaft itself. This type of scalp inflammation can lead to hair thinning.
Keep reading to discover other serious diseases that cause severe hair loss!