As a medical professional with expertise in dermatology, I can provide you with a detailed explanation of the possible causes of bruise-like spots on the skin.

Bruising, medically known as contusion, is caused when small blood vessels beneath the skin's surface rupture and leak blood into the surrounding tissue. This can happen due to various reasons:


1. Trauma or Injury: The most common cause of bruising is physical injury, which can range from a minor bump or fall to more severe accidents.


2. Age: As people age, their skin becomes thinner and loses some of its protective padding, making it more susceptible to bruising.


3. Nutritional Deficiencies: A lack of certain nutrients, such as vitamin C, vitamin K, and iron, can lead to easy bruising.


4. Blood Clotting Disorders: Conditions that affect the body's ability to form clots, like hemophilia or von Willebrand disease, can result in frequent bruising.


5. Medications: Certain medications, including blood thinners like warfarin, aspirin, and nonsteroidal anti-inflammatory drugs (NSAIDs), can increase the risk of bruising.


6. Diseases: Certain diseases, such as scurvy, liver disease, or kidney disease, can cause increased fragility of blood vessels and lead to bruising.

7.
Sun Exposure: Prolonged exposure to the sun can make the skin more prone to bruising.

8.
Inflammatory Conditions: Conditions like dermatitis herpetiformis or vasculitis can cause skin to bruise more easily.

9.
Idiopathic: Sometimes, the cause of bruising is unknown and is referred to as idiopathic.

It's important to consult with a healthcare provider if you notice unexplained or recurrent bruising, as it could be a sign of an underlying health issue.

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Petechiae don't look like bruises. ... Sudden unexplained bruising or blood spots under the skin or a sudden increase in the frequency of bruising may be caused by: A medicine, such as aspirin or blood thinners (anticoagulants). Infection that causes the buildup of toxin in the blood or tissues (sepsis).read more >>