Red bumps appear on the body and then subside on their own after a while.

In general, the appearance of red bumps on the body that subside spontaneously after a short time may be caused by temporary vasodilation, insect bites, allergic reactions, urticaria, or eczema. Different treatments can be selected according to the specific cause. Detailed analysis is as follows:

1. Temporary vasodilation: External factors such as temperature changes, emotions, or stress may lead to temporary blood vessel dilation, causing transient red bumps or papules. Once the triggering factor disappears, the bumps usually resolve on their own.

2. Insect bites: Bites or stings from insects can cause temporary red bumps on the skin, often accompanied by itching. These bumps may disappear spontaneously.

3. Allergic reaction: The bumps may result from an allergy to certain foods, medications, cosmetics, pollen, or other substances. Avoiding contact with the allergen is recommended, and antihistamines such as cetirizine hydrochloride tablets or loratadine tablets may be used under medical guidance to relieve symptoms.

4. Urticaria: A common skin condition, urticaria is typically triggered by allergic reactions and manifests as red, swollen, itchy rashes on the skin. Medications such as dexamethasone tablets or chlorpheniramine tablets may be used as directed by a physician.

5. Eczema: Often associated with circulatory disorders, immune dysfunction, endocrine or metabolic changes, and chronic infection foci, eczema may recur frequently due to irritation from harmful substances, leading to the phenomenon of bumps appearing and disappearing intermittently. Symptoms such as scratching, pustules, and crusts may also occur. Treatment options include topical agents like desonide cream or tacrolimus ointment, and oral medications such as levocetirizine hydrochloride tablets, used under medical supervision.

If symptoms are severe or persist for a prolonged period, prompt medical consultation is recommended.