Allergic Rhinitis: This condition is characterized by an allergic reaction to airborne allergens, leading to nasal congestion, which can cause facial puffiness, especially in the morning due to increased fluid accumulation overnight.

Sinusitis: Inflammation of the sinuses can lead to facial swelling, particularly in the morning, as fluid accumulates and sinus pressure increases during the night.
Hormonal Changes: Fluctuations in hormone levels, such as those experienced during menstruation or menopause, can lead to water retention and facial puffiness.
Sleep Position: Sleeping with the face down or on the side can cause fluid to accumulate in the facial tissues, leading to puffiness in the morning.
Dietary Factors: Consuming high-sodium foods or drinks before bedtime can lead to water retention and facial puffiness in the morning.

Thyroid Eye Disease: A condition associated with Graves' disease, characterized by swelling of the tissues around the eye, which can cause facial puffiness and other serious complications if left untreated.
Angioedema: A severe, potentially life-threatening allergic reaction that can cause rapid swelling of the face, lips, tongue, and throat.
Heart Failure: Severe cases of heart failure can lead to fluid buildup in the body, including the face, resulting in puffiness.

Sjögren's Syndrome: An autoimmune disorder that can cause inflammation and swelling in various parts of the body, including the face.
Cushing's Syndrome: A rare endocrine disorder caused by excess cortisol, which can lead to facial puffiness among other symptoms.
Lymphedema: A condition characterized by the abnormal accumulation of fluid in the body's tissues, which can cause swelling in the face and other areas.