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 de-pigmenting 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.
Other options do exist and a Dermatologist can guide you through the various interventions.
People usually don't use sunscreens as they may be greasy or make your face appear white.There are different type of sunscreens available and there is one for everyone, so find the one that will help you.