Red spots appearing on the body that are not painful or itchy, what could be the cause?

Generally, red spots appearing on the body that are neither painful nor itchy may be caused by genetic factors, vascular nevi, endocrine disorders, spider angiomas, allergic purpura, or other reasons. If the above conditions occur, it is recommended to seek medical treatment promptly. The specific analysis is as follows:

1. Genetic Factors

Genetic factors might cause an individual's skin to be more sensitive to certain stimuli or directly affect the growth and arrangement of skin cells, resulting in painless and non-itchy red spots on the skin. In daily life, moderate exercise should be performed to enhance physical resistance.

2. Vascular Nevus

Vascular nevi are mainly formed by hyperplasia and dilation of blood vessels filled with blood in the deep dermis or subcutaneous tissue, forming soft swellings. These spots are neither painful nor itchy, but their number might increase. If they affect daily life, concealer products can be used for coverage.

3. Endocrine Disorders

Long-term mental anxiety, stress, fatigue, and staying up late might lead to endocrine disorders, which can affect the skin's metabolism, making it prone to develop painless and non-itchy red spots. Symptoms such as fatigue and mood swings may also accompany this condition. Treatment might involve medications like hydrocortisone tablets, fludrocortisone acetate tablets, and levothyroxine sodium tablets, under a doctor's guidance.

4. Spider Angioma

Spider angiomas are usually caused by liver dysfunction, which leads to estrogen accumulation in the body. When liver function is impaired, the liver's ability to inactivate estrogen weakens, causing a relative increase in estrogen levels in the body. This stimulates the skin's blood vessels, resulting in painless and non-itchy red spots. Liver function abnormalities may also be present. Medications such as entecavir dispersible tablets, silymarin capsules, and lamivudine tablets should be used as directed by a physician.

5. Allergic Purpura

Allergic purpura is mainly caused by skin allergies or low immunity. Bruises or urticarial rashes appear on the skin, presenting as small red spots that are neither painful nor itchy. Symptoms such as loss of appetite and fever may also occur. Patients should use medications like cetirizine tablets, loratadine tablets, and prednisone tablets as instructed by a doctor.

To prevent skin problems, it is important to maintain good lifestyle habits in daily life, including regular sleep patterns, balanced diet, moderate exercise, and avoiding prolonged exposure to irritants, in order to maintain healthy skin condition.