How do I know if I'm allergic to a skincare ingredient?

Immediate Answer: True allergies cause immediate reactions (itching, swelling, rash within minutes-hours). Irritation develops gradually (redness, stinging, flaking over days). Test new products on a small area first. If severe symptoms appear, seek medical attention.

The Science: Allergy: Immune system overreaction to a substance. Symptoms appear quickly and consistently upon exposure.

• Symptoms: Itching, swelling, hives, breathing difficulty (severe)
• Timeline: Minutes to hours

Irritation: Skin inflammation from excessive ingredient exposure or barrier damage.

• Symptoms: Redness, stinging, flaking, tightness
• Timeline: Develops over hours-days with continued use

Most "product allergies" are actually irritation, not true allergies.

How to test for allergies:

1. Patch test new products on small area (inner arm, behind ear) for 24-48 hours
2. If no reaction, gradually introduce to face
3. If redness/itching appears immediately, discontinue and rinse
4. If symptoms persist beyond 1 hour, consult dermatologist

If You Suspect Sensitivity to Nordic Formula Products: If you suspect sensitivity to Nordic Formula products:

1. Stop use immediately
2. Rinse thoroughly with water
3. Apply cooling moisturiser only
4. Wait 24 hours—most irritation resolves
5. If reaction persists, consult dermatologist

Pro Tip: Gradual introduction (starting every 3 days, increasing frequency) prevents most irritation reactions. True allergies are rare and usually consistent across products containing the same ingredient.