Tying your hair in a bun tightly can lead to traction alopecia, i.e., hair loss caused by tension on hair follicles. According to PubMed, tight buns can cause traction alopecia due to tension on ...

Causes Permanent Indentations Tight rubber bands can leave lasting marks or indentations on your hair. To avoid this, switch up the placement of your ponytail or bun. # Avoid Tying Hair While ...