Allergic Rhinitis: This condition is characterized by inflammation of the nasal passages, which can lead to increased blood flow and fragility of the blood vessels around the eyes, resulting in bruising. The absence of trauma and the intermittent nature of the bruising support this diagnosis, as allergic reactions can be episodic.

Blepharitis: An inflammation of the eyelids that can cause blood vessels to become more visible and prone to bruising.
Eczema (Atopic Dermatitis): Skin inflammation around the eyes can lead to increased susceptibility to bruising due to skin barrier disruption and potential scratching.
Vitamin Deficiencies (Vitamin K, C, or B12): Deficiencies in these vitamins can affect blood clotting and vessel integrity, leading to easy bruising.

Amyloidosis: A condition where abnormal proteins (amyloid) accumulate in various organs, including blood vessels, which can lead to bruising and bleeding. Although rare, missing this diagnosis could be fatal due to its potential to affect multiple organ systems.
Bleeding Disorders (e.g., Hemophilia, Von Willebrand Disease): These conditions affect the blood's ability to clot, leading to bruising without trauma. Early diagnosis is crucial for managing these conditions and preventing severe complications.
Leukemia or Lymphoma: Certain types of cancer can cause bruising due to bone marrow suppression leading to thrombocytopenia (low platelet count) or abnormalities in blood clotting factors.

Ehlers-Danlos Syndrome: A group of disorders that affect connective tissues supporting the skin, bones, blood vessels, and many other organs and tissues. Defects in connective tissues cause the signs and symptoms of these conditions, which can include easy bruising.
Scurvy: Caused by a lack of vitamin C, scurvy can lead to connective tissue weakness, bleeding, and bruising.
Mastocytosis: A condition characterized by an accumulation of mast cells in one or more organs, which can lead to increased histamine release, potentially causing blood vessel instability and bruising.