5 signs you have eldest-daughter syndrome, from a therapist who was the oldest of 6 kids

• "Eldest-daughter syndrome" is not an official diagnosis, but it can describe how first daughters feel.
• A therapist said the common traits are perfectionism, people-pleasing, and over-responsibility.
• As the oldest of her six siblings, she said she related to eldest-daughter syndrome.

Eldest daughters often face more pressure than other kids, including oldest boys, according to an assortment of new studies.