What Are Red Bumps on the Skin?

Red bumps can appear suddenly or develop gradually and may be caused by many different skin conditions. Depending on the cause, they may be itchy, tender, painful, scaly, or filled with fluid or pus. Some causes are mild and temporary, while others may require medical treatment. Because many skin conditions can look similar, a dermatologist can help determine the cause when bumps persist, worsen, or are accompanied by other concerning symptoms.

Common Causes of Red Bumps

Acne

Acne is a common cause of red bumps, especially on the face, chest, shoulders, and back. It develops when hair follicles become clogged with oil and dead skin cells, with inflammation and bacteria also contributing. Acne can take several forms, including:

• Papules: Small, inflamed red or skin-colored bumps that may be tender.

• Pustules: Inflamed bumps that contain visible white or yellow pus.

Acne is influenced by several factors, including hormones, genetics, excess oil production, and inflammation. Mild acne may improve with over-the-counter treatments, while persistent, scarring, or more severe acne may benefit from evaluation and treatment by a dermatologist.

Keratosis Pilaris

Often called “chicken skin,” keratosis pilaris causes small, rough bumps that most commonly occur on the upper arms, thighs, cheeks, or buttocks. The bumps develop when keratin builds up and plugs the openings of hair follicles. Keratosis pilaris is harmless and often improves with moisturizers and gentle exfoliating products, although it may persist or recur over time.

Rosacea

Rosacea is a chronic inflammatory skin condition that commonly causes persistent or recurrent facial redness, flushing, visible small blood vessels, and acne-like red bumps or pustules. Symptoms can be worsened by individual triggers such as sun exposure, heat, alcohol, spicy foods, or stress. Although rosacea is chronic, a variety of topical, oral, and procedural treatments can help control its symptoms.

Folliculitis

Folliculitis is inflammation of the hair follicles and can have infectious or noninfectious causes. It often appears as small red bumps or pustules centered around individual hairs and may be itchy, tender, or painful. Shaving, friction, occlusion, and certain bacterial or yeast infections can contribute. Treatment depends on the underlying cause, so persistent, recurrent, or widespread folliculitis should be evaluated by a healthcare professional.

Rashes

Many different rashes can produce red bumps. Common causes include eczema, allergic or irritant contact dermatitis, insect bites, medication reactions, and certain infections. The appearance, location, symptoms, and timing of the rash can provide important clues to its cause. Because treatment varies considerably depending on the diagnosis, persistent or worsening rashes should be evaluated rather than treated based on appearance alone.

Hives (Urticaria)

Hives, or urticaria, are raised, itchy welts that can vary in size and often appear and disappear over the course of minutes to hours, with individual spots typically resolving within 24 hours. Acute hives may be triggered by infections, medications, foods, or other exposures, although a specific cause is not always identified. Chronic hives lasting more than six weeks are often not caused by a specific allergy and may require medical evaluation and ongoing treatment.

Perioral Dermatitis

Perioral dermatitis, more broadly called periorificial dermatitis, is an inflammatory condition that causes clusters of small red or skin-colored bumps around the mouth and sometimes around the nose or eyes. The skin may also feel dry, sensitive, or irritated. Topical corticosteroids can trigger or worsen the condition, and certain skin-care or cosmetic products may also contribute. Because treatment often requires stopping aggravating products and using prescription medication, persistent cases should be evaluated by a healthcare professional.

When Should You See a Dermatologist?

Consider seeing a dermatologist if red bumps persist, repeatedly return, worsen, cause significant discomfort, or begin to scar. Medical evaluation is also appropriate when the diagnosis is unclear or over-the-counter treatments are not helping. Seek prompt medical care for a rapidly spreading or painful rash, blistering or skin peeling, involvement of the eyes or mouth, fever or other systemic symptoms, or signs of a serious allergic reaction such as swelling of the lips or tongue or difficulty breathing.

At Pinnacle Dermatology, our dermatology team evaluates and treats a wide range of skin conditions. Because many conditions can cause similar-looking red bumps, an accurate diagnosis can help guide the most appropriate treatment plan for your skin.

Take the First Step Toward Clearer Skin

If red bumps are causing discomfort, persist despite home care, or are simply difficult to identify, consider scheduling an appointment with Pinnacle Dermatology. A dermatology professional can evaluate your skin, determine the likely cause, and recommend treatment based on your diagnosis and individual needs.