Swollen Glands and Burning Tongue: Causes and When to See a Doctor

Cervical lymphadenopathy (swollen neck glands) with a burning tongue (glossodynia) suggests an infectious, inflammatory, or systemic process.

Common Causes

1. Infections:
   • Viral: EBV (mono), CMV, HSV, HIV, Coxsackie (herpangina).
   • Bacterial: Strep throat (GAS), peritonsillar abscess, dental abscess, TB.
   • Fungal: Oral candidiasis (thrush) — burning tongue + white plaques.
2. Allergic/Contact Reactions:
   • Oral allergy syndrome (pollen-food cross-reactivity).
   • Toothpaste/mouthwash ingredients (SLS, cinnamon, mint).
   • Food allergens.
3. Medication Side Effects:
   • ACE inhibitors (angioedema, cough).
   • Chemotherapy/radiation (mucositis).
   • Antibiotics (oral microbiome disruption → candidiasis).
   • Bisphosphonates (osteonecrosis risk).
4. Nutritional Deficiencies: B12, folate, iron, zinc, B2 (riboflavin) — cause glossitis, burning.
5. Autoimmune/Inflammatory:
   • Sjögren's syndrome (dry mouth, burning).
   • Lichen planus (oral erosions, white striae).
   • Behçet's disease (oral/genital ulcers).
6. Neuropathic: Burning mouth syndrome (idiopathic, small fiber neuropathy).
7. Malignancy (Rare): Lymphoma, leukemia, oral squamous cell carcinoma.

When to Seek Medical Attention

• Nodes >1 cm, hard, fixed, matted, or supraclavicular.
• Persistent >2–3 weeks without clear viral illness.
• Associated fever, night sweats, weight loss.
• Difficulty swallowing, breathing, or speaking.
• Unilateral tongue symptoms (rule out cancer).

Initial Workup

• CBC with differential, ESR/CRP.
• Throat culture/NAAT for GAS, EBV/CMV serology if indicated.
• HIV test (if risk factors).
• Iron, B12, folate, TSH.
• Oral exam ± biopsy if suspicious lesion.

Most cases are benign and self-limited, but persistent or progressive symptoms require thorough evaluation.