Vitamin C Deficiency (Scurvy): This condition is characterized by poor collagen synthesis, leading to fragile blood vessels and easy bruising. It's a common cause of unexplained bruising, especially in individuals with poor dietary habits.

Vitamin K Deficiency: Essential for blood clotting, a deficiency in vitamin K can lead to easy bruising and bleeding. This is more common in individuals with liver disease, those taking certain medications like warfarin, or with malabsorption syndromes.
Idiopathic Thrombocytopenic Purpura (ITP): An autoimmune condition where the body produces antibodies against platelets, leading to their destruction and resulting in low platelet counts, which can cause bruising.
Medication Side Effects: Certain medications, such as anticoagulants (e.g., aspirin, heparin), antiplatelet agents, and some antibiotics, can increase the risk of bruising.

Leukemia: Certain types of leukemia can cause bruising due to bone marrow failure leading to decreased production of platelets and other blood cells. Early detection is crucial for effective treatment.
Liver Disease: Conditions like cirrhosis can lead to coagulopathy due to decreased production of clotting factors, resulting in bruising and bleeding tendencies.
Bleeding Disorders (e.g., Hemophilia): Although less common, these disorders can present with bruising and require prompt diagnosis to manage bleeding risks.

Ehlers-Danlos Syndrome: A group of genetic disorders affecting connective tissue, which can lead to fragile skin and blood vessels, resulting in easy bruising.
Amyloidosis: A condition characterized by the deposition of amyloid proteins in various tissues, including blood vessels, which can cause bruising and bleeding.
Vasculitis: Inflammation of the blood vessels can lead to bruising, among other symptoms, and requires early diagnosis to prevent organ damage.