Puffiness can be due to fluid retention, often on wakening or after eating a salty meal.

Allergies, atopic dermatitis, and smoking can also play a part. Tissue structures and muscles weaken with age and surrounding skin will start to sag – a thin epidermis or dermis under the eye is also a contributing factor.

Other possible indications are asthma, deoxygenated blood, and increased melanin, with the most significant factor being your family history