I'm sorry to hear about the tanning on your face; prolonged sun exposure without sunscreen can definitely cause uneven darkening of the skin. Here are some effective steps you can take to help reduce the tanning and protect your skin:

• Sun Protection: Start using a broad-spectrum sunscreen with at least SPF 30 every day, even when indoors or on cloudy days. Reapply every 2-3 hours if you are outdoors.
• Gentle Cleansing: Use a mild cleanser to remove dirt and sweat without irritating your skin.
• Exfoliation: Gently exfoliate your face 1-2 times a week to remove dead skin cells and promote skin renewal. Avoid harsh scrubs; opt for chemical exfoliants with ingredients like lactic acid or glycolic acid if suitable.
• Skin Brightening Ingredients: Consider products containing natural brightening agents such as turmeric, aloe vera, or licorice extract, which are commonly used in Indian skincare. Ingredients like vitamin C can also help lighten pigmentation.
• Hydration and Moisturizing: Keep your skin well-moisturized to support healing and maintain skin barrier function.
• Home Remedies: Applying a mixture of yogurt and turmeric or aloe vera gel can soothe the skin and may help lighten tan over time.
• Avoid Further Sun Exposure: Wear a wide-brimmed hat, sunglasses, and seek shade when outdoors.

Since tanning can sometimes be stubborn or uneven, it’s a good idea to consult a dermatologist who can assess your skin and may recommend treatments like chemical peels, laser therapy, or prescription creams if needed.

Taking these steps consistently will help improve your skin tone and protect it from further damage.To narrow down potential causes, we will need some more information.I understand you're dealing with severe sun tanning. To provide the best advice, could you please share your age and gender?