It sounds like you're having a strong irritant or allergic skin reaction after using the azelaic acid gel — stop the gel and follow the steps below.

🩺 Symptoms

• Burning, redness and visible swelling at the site after using Ezanic 20% Gel (azelaic acid 20%).
• You may also have dryness, tingling or peeling, which are known side effects.

⚕️ What this likely is

• This may be an irritant contact dermatitis, allergic contact dermatitis, or a chemical burn from a high-concentration topical. These are tentative possibilities based on your symptom of burning and swelling.

🏥 Immediate actions (now)

• Stop the gel and gently wash the area with lukewarm water and mild soap.
• Apply a cool compress for 10–15 minutes to reduce swelling.
• Use a bland emollient (e.g., petroleum jelly) to protect skin; avoid perfumes or alcohol-based products.
• Take an oral antihistamine (e.g., cetirizine) for itching/swelling if appropriate; OTC (over-the-counter) options may help.
• If you have severe pain, open blisters, or large skin loss, avoid topical steroids and seek medical care.

⚠️ Warning signs — go to emergency care or call Apollo Emergency - 1066 if you have any of these

• Difficulty breathing or throat tightness.
• Rapidly spreading swelling of face/lips/eyes.
• High fever, spreading redness, increasing pain, or pus/drainage.

🩺 When to see a doctor

• See a dermatologist promptly (same day if severe; within 24–48 hours if moderate) and bring the product tube. If uncertain, visit urgent care.

🩺 Follow-up question

How long after applying the gel did the burning and swelling start, and do you have any breathing difficulty or facial/throat swelling?

If you want, I can explain home remedies or when a topical steroid is appropriate.