1. How to Choose Sunscreen?

Selecting the right sunscreen is crucial for effective protection against UV rays. Here’s a guide on how to choose sunscreen based on skin type, activity, and season:

Based on Skin Type

• Dry Skin: Look for sunscreens with moisturizing ingredients like hyaluronic acid or glycerin. Cream-based sunscreens are ideal.
• Oily Skin: Opt for oil-free, non-comedogenic sunscreens that won't clog pores. Gel-based sunscreens are a good choice.
• Sensitive Skin: Choose sunscreens with physical blockers like zinc oxide or titanium dioxide. Avoid fragrances and chemical filters.

Based on Activity

• Daily Use: A broad-spectrum SPF 30 sunscreen is generally sufficient for daily use. Consider a lightweight formula that can be easily incorporated into your daily skincare routine.
• Outdoor Activities: For extended outdoor activities or sports, use a water-resistant sunscreen with at least SPF 50. Reapply every two hours or after sweating/swimming.
• Swimming: Ensure the sunscreen is water-resistant. Apply generously and reapply every 80 minutes.

Based on Season

• Summer: Higher SPF levels (50+) are recommended due to stronger UV rays. Look for water-resistant options if you’ll be swimming or sweating.
• Winter: Even in winter, UV protection is necessary. Opt for a moisturizer with SPF 30. Don't forget to apply sunscreen on exposed areas like your face and hands.
• Cloudy Days: UV rays penetrate clouds, so sunscreen is still necessary. A broad-spectrum SPF 30 sunscreen is recommended.

2. How to Determine if Sunscreen Has Expired?

Expired sunscreen can lose its effectiveness, so it’s important to know how to check its shelf life and store it properly:

Shelf Life

• Check Expiration Date: Sunscreens typically have an expiration date printed on the bottle. If it's past this date, it's time to replace it.
• General Rule: Most sunscreens are effective for three years from the date of manufacture. If there's no expiration date, mark the purchase date and replace after three years.

Storage Methods

• Keep It Cool: Store sunscreen in a cool, dry place away from direct sunlight. Heat and sunlight can degrade the active ingredients.
• Avoid the Car: Don’t store sunscreen in your car where temperatures can fluctuate dramatically, reducing its effectiveness.

3. What to Do If Skin Feels Uncomfortable After Using Sunscreen?

If you experience discomfort or an allergic reaction after using sunscreen, follow these steps:

Dealing with Allergic Reactions

• Stop Using the Product: Discontinue use immediately if you notice redness, itching, or swelling.
• Cleanse the Skin: Wash the affected area with a gentle cleanser and cool water to remove any residue.
• Apply a Soothing Product: Use a hypoallergenic moisturizer or aloe vera gel to calm the skin.
• Consult a Dermatologist: If the reaction is severe or doesn't improve, seek medical advice.

Recommended Brands for Low-Allergenic Sunscreens

• La Roche-Posay Anthelios: Known for its gentle formulas suitable for sensitive skin.
• Neutrogena Sensitive Skin Sunscreen: Formulated with physical blockers and free from common irritants.
• Aveeno Positively Mineral: A mineral sunscreen designed for sensitive skin, free from fragrances and parabens.