Differential Diagnosis for Swollen Firm Right Forearm
Single Most Likely Diagnosis
- Cellulitis: A bacterial infection of the skin and subcutaneous tissue, which could explain the swelling, firmness, and pain in the right forearm. The inability to assess skin turgor due to swelling also supports this diagnosis.
Other Likely Diagnoses
- Deep Vein Thrombosis (DVT): A blood clot in the deep veins of the forearm could cause swelling, pain, and firmness, especially if the clot is large or located near the surface.
- Trauma or Hematoma: A recent injury to the forearm could lead to swelling, pain, and firmness due to blood accumulation in the tissues.
- Insect Bite or Sting Reaction: An allergic reaction to an insect bite or sting could cause localized swelling, pain, and firmness.
Do Not Miss Diagnoses
- Compartment Syndrome: A serious condition where increased pressure within the muscle compartments of the forearm leads to inadequate blood supply, which can cause pain, swelling, and firmness. If missed, it can result in permanent damage or necrosis.
- Necrotizing Fasciitis: A severe bacterial infection that destroys tissue under the skin, which can present with swelling, pain, and firmness, and is life-threatening if not promptly treated.
Rare Diagnoses
- Lymphedema: A chronic condition characterized by the abnormal accumulation of protein-rich fluid in the interstitial tissue, leading to swelling and firmness, but it typically develops over a longer period.
- Lipoma or Soft Tissue Tumor: A benign or malignant tumor in the forearm could cause swelling and firmness, but it would be less likely to cause pain with light to medium pressure.
- Vasculitis: Inflammation of the blood vessels, which can cause swelling, pain, and firmness, but it is a less common condition and might be associated with systemic symptoms.