Capillaritis is an inflammatory change affecting the smallest blood vessels, known as capillaries, usually in the skin. In this condition, the walls of these tiny vessels become damaged, which causes red blood cells to leak out of the capillaries and create small, dot-like bleeds known as petechiae.
How does capillaritis appear?
Capillaritis typically shows up as small, reddish-brown spots on the skin. These spots most often appear on the lower legs and less commonly on the arms or other parts of the body. They form because blood components leak out of the inflamed capillaries and collect in the surrounding tissue. The spots are usually painless, rarely itchy, and cannot be felt as raised areas on the skin. Over time, they may change colour as the blood in the tissue is slowly broken down. They often stay visible for weeks or months before gradually fading away.
Who is affected and how does capillaritis develop?
Capillaritis can occur at any age, but it is more common in middle-aged adults. The exact causes are not always clear. Sometimes the condition develops after an infection, as a reaction to certain medicines, or in connection with other underlying health conditions. Mechanical factors such as standing for long periods or pressure on the legs may also play a role. In many cases, however, the cause remains unclear and no specific trigger can be found.
Is capillaritis dangerous?
A diagnosis of capillaritis often causes worry, mainly because of the noticeable changes to the skin. In most cases, though, the condition is harmless and does not cause any serious health problems. The inflammation usually stays limited to the surface capillaries of the skin and does not affect any internal organs. General wellbeing, energy levels, and other bodily functions remain unaffected. Only very rarely is capillaritis linked to other conditions that require closer medical investigation.
Does capillaritis need to be treated?
A specific treatment is usually not necessary for capillaritis, as the condition often clears up on its own. The spots may remain visible for quite some time, but they generally disappear without any lasting effects. Anyone bothered by the appearance of their skin can try simple measures to reduce pressure on the affected areas, for example by elevating the legs or avoiding long periods of standing. Cooling creams or lotions may help if there is any itching or discomfort. Medicines are only needed in exceptional cases, such as when capillaritis occurs alongside other complaints or follows an unusually severe course.
When is it worth seeing a doctor?
Although capillaritis is usually harmless, it is worth getting a medical assessment if many or widespread skin changes appear suddenly, if the spots are accompanied by pain, fever, or other symptoms, or if there is any uncertainty about the cause. This helps to make sure that no other condition requiring treatment is present. A medical check-up can also be useful if capillaritis persists or keeps coming back, in order to rule out rare underlying conditions.
What can be done at home?
To ease symptoms, it helps to wear comfortable clothing and shoes that do not put pressure on the affected areas of skin. Elevating the legs, moving regularly, and avoiding long periods of standing can help to improve circulation and prevent new spots from forming. Anyone who notices that certain medicines or external factors seem to trigger symptoms should discuss this with their doctor. In most cases, however, patience is all that is needed while the skin changes gradually disappear.
Capillaritis is therefore a usually harmless but visible inflammation of the smallest blood vessels, which shows itself through small reddish-brown spots on the skin. Specific treatment is rarely needed, and the condition generally clears up on its own.
