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  • Select from over 100 symptoms to read more about managing your child's illness.

    Is Your Child Sick? TM


    Skin Lump

    Is this your child's symptom?

    • A skin lump or bump covered by normal skin
    • Skin swelling just in one spot (localized) is also included

    Causes of Skin Lumps

    • Insect Bites. The most common cause of an itchy bump is a mosquito bite. Other insects can also cause little bumps.
    • Stings. A bee sting can cause a painful bump. The swelling can become quite large.
    • Lymph Nodes. Most common cause of a lump or mass felt under the skin. Commonly found in the neck or groin. Nodes have a boundary or edge and are movable. This is not the case for the swelling seen with insect bites. Lymph nodes become larger with infections.
    • Scalp Hematoma. The most common cause of a lump on the head is a scalp hematoma (goose egg). In a child under 2 years of age the injury may not have been seen.
    • Injuries. New lumps anywhere can be caused by an injury that wasn't observed. A bruise is often present with the swelling.
    • Callus. Broken bones heal with new bone formation. The medical term is callus. The callus feels like a bony knot that is larger than the bone itself. A callus is most commonly felt after a collarbone fracture.
    • Boils. A boil is a skin abscess. It causes a very painful red lump.

    Lumps that are a Normal Part of the Body

    • Breast Bud. A small disc-shaped lump felt under the nipple. It indicates the onset of puberty in 7-12 year old girls.
    • External Occipital Protuberance. The bony lump felt at the base of the skull in back.
    • Mastoid Process. The bony lump felt behind each lower ear.
    • Xiphoid Process. A small hard lump felt at the lower end of the sternum (breastbone).

    Common Objects Used to Guess the Size

    • Pea or pencil eraser: ¼ inch or 6 mm
    • Dime: ¾ inch or 1.8 cm
    • Quarter: 1 inch or 2.5 cm
    • Golf ball: 1 ½ inches or 3.8 cm
    • Tennis Ball: 2 ½ inches or 6.4 cm

    When to Call for Skin Lump

    When to Call for Skin Lump

    Call Doctor or Seek Care Now

    • Redness spreading from the lump with fever
    • Groin swelling and painful
    • Age less than 12 months and on scalp. (Exception: normal bump in back at base of skull)
    • Your child looks or acts very sick
    • You think your child needs to be seen, and the problem is urgent

    Call Doctor Within 24 Hours

    • Redness spreading from the lump without fever
    • Boil suspected (painful, non-itchy, red lump)
    • Age 12 months or older and on scalp. (Exception: normal bump in back at base of skull)
    • Can't move nearest joint normally (bend and straighten completely)
    • Swelling is painful and cause not known
    • You think your child needs to be seen, but the problem is not urgent

    Call Doctor During Office Hours

    • Large lump more than 1 inch (2.5 cm) and cause not known
    • Small lump lasts more than 7 days and cause not known
    • You have other questions or concerns

    Self Care at Home

    • Small lump present 7 days or less and cause not known. Reason: Probably due to insect bite not observed.
    • Breast bud - normal lump under the nipple
    • External occipital protuberance - normal lump on back of head
    • Mastoid process - normal lump behind each lower ear
    • Xiphoid process - normal lump at bottom of breastbone

    Call Doctor or Seek Care Now

    • Redness spreading from the lump with fever
    • Groin swelling and painful
    • Age less than 12 months and on scalp. (Exception: normal bump in back at base of skull)
    • Your child looks or acts very sick
    • You think your child needs to be seen, and the problem is urgent

    Call Doctor Within 24 Hours

    • Redness spreading from the lump without fever
    • Boil suspected (painful, non-itchy, red lump)
    • Age 12 months or older and on scalp. (Exception: normal bump in back at base of skull)
    • Can't move nearest joint normally (bend and straighten completely)
    • Swelling is painful and cause not known
    • You think your child needs to be seen, but the problem is not urgent

    Call Doctor During Office Hours

    • Large lump more than 1 inch (2.5 cm) and cause not known
    • Small lump lasts more than 7 days and cause not known
    • You have other questions or concerns

    Self Care at Home

    • Small lump present 7 days or less and cause not known. Reason: Probably due to insect bite not observed.
    • Breast bud - normal lump under the nipple
    • External occipital protuberance - normal lump on back of head
    • Mastoid process - normal lump behind each lower ear
    • Xiphoid process - normal lump at bottom of breastbone

    Care Advice

    Treatment for a Small Lump or Swelling

    1. What You Should Know:
      • Most new swellings are due to insect bites. Mosquito bites account for 90% of them. Your child may not even know that he got bit.
      • Suspect an insect bite if there are bites on other parts of the body.
      • While most insect bites cause a small red bump, some are larger (like a hive).
      • This does not mean your child has an allergy or the bite is infected.
      • Here is some care advice that should help.
    2. Cold Pack for Swelling:
      • Apply a cold pack or cold wet washcloth for 20 minutes.
    3. Steroid Cream for Itching:
      • If the swelling is itchy, use 1% hydrocortisone cream (such as Cortaid). No prescription is needed.
      • Do this 3 times per day.
    4. Allergy Medicine for Itching or Swelling:
      • For severe itch or swelling, give an allergy medicine by mouth. No prescription is needed.
      • Benadryl is best. Repeat every 6 hours as needed.
      • If you only have another allergy medicine at home (but not Benadryl), use that. Follow the package directions.
    5. What to Expect:
      • Most insect bites itch or hurt for 1 or 2 days.
      • The swelling usually peaks in 2 days, but may last a week.
      • If the swelling becomes larger or doesn't go away, it needs to be examined.
    6. Call Your Doctor If:
      • Swelling becomes very painful
      • Fever occurs
      • Swelling becomes large (over 1 inch or 2.5 cm)
      • Swelling lasts over 7 days
      • You think your child needs to be seen
      • Your child becomes worse

    Lumps that are a Normal Part of the Body

    1. Breast Buds - Normal Lump Under the Nipple:
      • Breast buds are normal, small disc-shaped rubbery lumps felt under the nipple.
      • Age. They normally occur in 8-12 year old girls and are the first sign of puberty. Sometimes, they are even normal in 7 year olds.
      • One Side. They sometimes start just on one side. Don't worry about that. Within 2 or 3 months, a breast bud will also appear on the other side.
      • Importance. The entire breast develops entirely from the breast bud, taking 2 or 3 years to completion.
      • Symptoms. Breast buds normally can be somewhat tender.
      • Caution: Never squeeze or massage breast buds. Reason: Can cause a serious infection.
      • Risks. None. Breast buds have no risk of turning into cancer.
      • Follow-up. You can have your child's doctor check the breast bud during the next regular office visit.
    2. External Occipital Protuberance - Normal Lump on Back of Head:
      • The lump you feel at the base of the skull in back is normal. It is a bony part of the skull that sticks out and feels hard.
      • If you feel carefully, you will find one on yourself or other children.
      • This is not caused by any injury.
    3. Mastoid Process - Normal Lump Behind the Ear:
      • The mastoid process is a bony lump you can feel behind the lower ear.
      • Muscles that turn the neck attach to the mastoid process.
      • The process is larger in men because of larger neck muscles.
      • The mastoid is filled with air cells that connect to the inner ear.
    4. Xiphoid Process - Normal Lump at Bottom of Breastbone:
      • The small hard lump at the lower end of the sternum (breastbone) is normal. It is called the xiphoid process. You can feel it.
      • It is more prominent in babies and slender children. Sometimes, it's more visible when breathing in.
      • If you feel carefully, you will find one on yourself or other children.
      • It's made of cartilage, but turns to bone in adults.
    5. Call Your Doctor If:
      • You have other questions or concerns

    And remember, contact your doctor if your child develops any of the 'Call Your Doctor' symptoms.

    Disclaimer: this health information is for educational purposes only. You, the reader, assume full responsibility for how you choose to use it.

    Copyright 2000-2018. Schmitt Pediatric Guidelines LLC.