Raised Bumps Near Your Knees? Common Causes, Home Care Tips, and When to See a Doctor

3. Allergic Contact Dermatitis

An allergic reaction can develop after exposure to:

  • Laundry detergent
  • Soap
  • Lotion
  • New clothing
  • Plants
  • Metals

Symptoms often include:

  • Itchy raised bumps
  • Redness
  • Swelling
  • Rash that develops where the skin touched the irritant

4. Insect Bites

Mosquitoes, fleas, bed bugs, and other insects commonly cause clusters of itchy bumps.

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You may notice:

  • One or several raised bumps
  • Redness
  • Swelling
  • Intense itching

5. Eczema

Eczema can appear almost anywhere on the body, including behind or around the knees.

Common symptoms include:

  • Dry patches
  • Redness
  • Itching
  • Small raised bumps
  • Cracked skin

6. Hives (Urticaria)

Hives are raised welts caused by an allergic reaction, infection, medication, or sometimes no obvious trigger.

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