​​​Outdoor activities make our skin tan. The only option is to wear protective full sleeves clothing, cap or a hat, to carry an umbrella and sunglasses. Skin already tanned can be treated with depigmenting creams. A good skin care regimen comprises 4 steps - cleansing, toning, moisturizing and sunblock. Based on your skin type, a dermatologist will recommend you appropriate products. Try using a lip balm with sunblock. Hope it helps.

Hi. Greetings. Sun tanning can occur even with short exposures and this is a protective mechanism of skin which is called immediate pigment darkening. Don't worry, continue to use a sunscreen of high SPF  at least around 30 - and reapply every three or four hours if exposed to sunlight for long duration. The following precautions would help you : 1. sunscreen should be applied half hour before sun exposure 2. Daily bed time use of moisturiser like cetaphil or emoderm in case of dry skin. Reapply during lunch break during office hours. 3. Use Peeling agents prescribed by dermatologist for reducing tan. Chemical  peels and micro derm abrasion is also an option. 4. Evaluation by dermatologist as to rule out any other causes of skin pigmentation. 5. Kindly read my blog on daily skin care on Practo health feed. Hope this helps. Warm regards. Dr Govind S Mittal