Red Skin Bump Larger Than 1/2 Cm in Diameter Symptoms & Causes

Understand red skin bump larger than 1/2 cm in diameter symptoms, including 10 causes & common questions.

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Contents

  1. 10 Possible Causes
  2. Questions Your Doctor May Ask
  3. Statistics
  4. Related Articles

10 Possible Red Skin Bump Larger Than 1/2 Cm In Diameter Causes

The list below shows results from the use of our quiz by Buoy users who experienced red skin bump larger than 1/2 cm in diameter. This list does not constitute medical advice and may not accurately represent what you have.

Non-specific dermatitis (skin inflammation)

Nonspecific dermatitis, or contact dermatitis, simply means inflammation of the skin from many different causes.

Most nonspecific dermatitis is caused by skin contact with a substance that provokes a reaction, which could be anything from plants to soap to jewelry to fabrics. Some may be due to an autoimmune condition, where the body's immune system attacks itself.

Risk factors include a family or personal history of allergies, asthma, or other condition which weakens the immune system; or constant contact with metals, plant life, or chemicals.

Symptoms commonly include red, swollen skin rash with itching, blistering, or oozing, which may become painful and infected.

Dermatitis itself is not contagious but can interfere with quality of life. A medical provider can help with managing the symptoms.

Diagnosis is made through patient history, physical examination, and sometimes skin biopsy and patch testing.

Treatment involves using protective measures if the substances cannot be avoided; making nutritional improvements to strengthen the immune system; using corticosteroid or other creams; and phototherapy.

Rarity: Common

Top Symptoms: red rash, itchy rash, painful rash

Symptoms that always occur with non-specific dermatitis (skin inflammation): red rash

Urgency: Self-treatment

Irritant contact dermatitis

Irritant contact dermatitis means a skin reaction that is caused by directly touching an irritating substance, and not by an infectious agent such as a bacteria or virus.

Common causes are soap, bleach, cleaning agents, chemicals, and even water. Almost any substance can cause it with prolonged exposure. Contact dermatitis is not contagious.

Anyone who works with an irritating substance can contract the condition. Mechanics, beauticians, housekeepers, restaurant workers, and health care providers are all susceptible.

Symptoms include skin that feels swollen, stiff, and dry, and becomes cracked and blistered with painful open sores.

A medical provider can give the best advice on how to heal the skin and avoid further irritation. Self-treatment can make the problem worse if the wrong creams or ointments are used.

Diagnosis is made through patient history, to find out what substances the patient comes into contact with, and through physical examination of the damaged skin.

Treatment involves avoiding the irritating substance if possible. Otherwise, the person can use petroleum jelly on the hands underneath cotton and then rubber gloves.

Rarity: Common

Top Symptoms: rash with well-defined border, itchy rash, red or pink, rough patch of skin, painful rash, red rash

Symptoms that always occur with irritant contact dermatitis: rash with well-defined border

Symptoms that never occur with irritant contact dermatitis: fever, black-colored skin changes, brown-colored skin changes, blue-colored skin changes

Urgency: Self-treatment

Skin abscess

A skin abscess is a large pocket of pus that has formed just beneath the skin. It is caused by bacteria getting under the skin, usually through a small cut or scratch, and beginning to multiply. The body fights the invasion with white blood cells, which kill some of the infected tissue but form pus within the cavity that remains.

Symptoms include a large, red, swollen, painful lump of pus anywhere on the body beneath the skin. There may be fever, chills, and body aches from the infection.

If not treated, there is the risk of an abscess enlarging, spreading, and causing serious illness.

Diagnosis is made through physical examination.

A small abscess may heal on its own, through the body's immune system. But some will need to be drained or lanced in a medical provider's office so that the pus can be cleaned out. Antibiotics are usually prescribed.

Keeping the skin clean, and using only clean clothes and towels, will help to make sure that the abscess does not recur.

Rarity: Common

Top Symptoms: rash with bumps or blisters, red rash, red skin bump larger than 1/2 cm in diameter, pus-filled rash, rash

Symptoms that always occur with skin abscess: rash with bumps or blisters

Urgency: Primary care doctor

Non-specific skin rash

Common causes of rash are contact dermatitis, sun damage, or allergic reaction. However, many rashes are a symptom of disease and should not be ignored.

Nonspecific rashes have widely varied symptoms:

  • May be flat and smooth; slightly raised or with swollen welts; clean and dry; or blistered and oozing.

May spread widely over the body, or be confined to one site.

  • May appear after eating certain foods; or after exposure to certain plants or to insect stings or bites.

Other symptoms may be present, including pain anywhere in the body; nausea; vomiting; fever; headache; or abdominal pain and upset.

Diagnosis is made through patient history and physical examination to determine the exact type, location, and history of the rash, along with any other symptoms that may be present.

Those symptoms will be investigated with blood tests or imaging. Skin swabs may be taken and tested. After the process has ruled out as many causes as possible, a course of treatment can be determined.

Rarity: Common

Top Symptoms: rash

Symptoms that always occur with non-specific skin rash: rash

Urgency: Wait and watch

Mole

Benign skin growths, such as moles, are very common and virtually everyone has some form of them. "Benign" means the growth is not cancerous. Some of these growths have genetic origins, and for some, the cause is not clear.

These skin growths may appear as flat "stains" in the skin or as raised clusters made up of tiny blo...

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Take a quiz to find out what might be causing your red skin bump larger than 1/2 cm in diameter

Pyogenic granuloma (a common, benign skin change)

Pyogenic granulomas are small, raised, red bumps on the skin. The bumps have a smooth surface and may be moist. They bleed easily because of the high number of blood vessels at the site. They are always benign.

Rarity: Rare

Top Symptoms: constant skin changes, light red or pink bump on skin, red skin bump larger than 1/2 cm in diameter, growing bump or blister, glistening, small (<1/2 cm) skin bump

Symptoms that always occur with pyogenic granuloma (a common, benign skin change): constant skin changes

Urgency: Wait and watch

Keratoacanthoma (a common, benign skin change)

Keratoacanthomas are rapidly growing lesions that occur primarily on sun-exposed skin in older persons. The majority of lesions involve the face and upper extremities, although they frequently occur on the lower extremities, especially in women.

Rarity: Uncommon

Top Symptoms: itchy rash, rash on sun-exposed areas, red skin bump larger than 1/2 cm in diameter, skin-colored rash, skin-colored, large (>1/2 cm) bump

Symptoms that never occur with keratoacanthoma (a common, benign skin change): fever

Urgency: Wait and watch

Boil (furuncle)

A furuncle, also called a boil, is infection of a hair follicle. The infection forms under the skin at the root of the hair and may occur anywhere on the body.

The infection is caused by bacteria, most often Staphylococcus aureus or "staph." Irritation caused by clothes or anything else rubbing the skin can cause the skin to break down and allow bacteria to enter.

Staph bacteria are found everywhere. Frequent and thorough handwashing, and otherwise maintaining cleanliness, will help to prevent its spread.

Most susceptible are those with a weakened immune system; diabetes; and other skin infections.

Symptoms include a single bump under the skin that is swollen, painful, and red, and contains pus.

It is important to treat the boil, since infection can spread into the bloodstream and travel throughout the body.

Diagnosis is made through physical examination and sometimes fluid sample from the boil.

Treatment may involve incision and drainage of the infection, followed by creams to apply to the site of the boil and/or a course of antibiotic medicine.

Rarity: Uncommon

Top Symptoms: pink or red facial bump, small facial lump, painful facial bump, marble sized facial lump, constant skin changes

Symptoms that always occur with boil (furuncle): pink or red facial bump

Symptoms that never occur with boil (furuncle): fever

Urgency: Self-treatment

Mosquito bite

Mosquito bites are bites from flying insects that feed on the blood of animals, including humans. Mosquito bites are more common during the summer or in warmer climates, at dawn or dusk, and near bodies of water.

In most cases, mosquito bites will cause a local skin reaction that gets better on ...

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Non-specific insect bite

Insect bites are very common. The saliva given off during the bit can sometimes cause dangerous allergic reactions that affect your ability to breathe. However, the vast majority of insect bites have no adverse effects besides the inflammation where the bite occurred.

Rarity: Common

Top Symptoms:

Urgency: Self-treatment

Questions Your Doctor May Ask About Red Skin Bump Larger Than 1/2 Cm In Diameter

To diagnose this condition, your doctor would likely ask the following questions:

  • Any fever today or during the last week?
  • What color is the skin change?
  • Is your rash raised or rough when you run your hand over the area of skin?
  • Have you been feeling more tired than usual, lethargic or fatigued despite sleeping a normal amount?

If you've answered yes to one or more of these questions

Please take a quiz to find out what might be causing your red skin bump larger than 1/2 cm in diameter. These questions are also covered.

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Red Skin Bump Larger Than 1/2 Cm In Diameter Symptom Checker Statistics

People who have experienced red skin bump larger than 1/2 cm in diameter have also experienced:

  • 4% Feeling Itchy Or Tingling All Over
  • 4% Vaginal Itch Or Burning
  • 2% Armpit Pain

People who have experienced red skin bump larger than 1/2 cm in diameter were most often matched with:

  • 66% Skin Abscess
  • 16% Non-Specific Dermatitis (Skin Inflammation)
  • 16% Irritant Contact Dermatitis

People who have experienced red skin bump larger than 1/2 cm in diameter had symptoms persist for:

  • 29% Over a month
  • 27% Less than a week
  • 25% Less than a day

Source: Aggregated and anonymized results from Buoy Assistant (a.k.a. the quiz).

Red Skin Bump Larger Than 1/2 Cm In Diameter Symptom Checker

Take a quiz to find out what might be causing your red skin bump larger than 1/2 cm in diameter