well it sounds like you're on the right track. in your line of work you certainly want to avoid too much sun exposure which can lead to skin cancer. a couple of suggestions. first remember that sunscreen needs to be applied at least 30 minutes before you go into the sun in order for it to be effective. also read the label on your sunscreen and make sure you reapply it at the suggested intervals. many sunscreens have to be re-applied every 2 hours. if you're getting sweaty you'll need to reapply it even more often than that. also you might consider looking for a sunscreen that contains zinc oxide which is a total sun blocker. zinc oxide generally prevents any sun at all from getting through while sunscreen may only filter out certain types of sunlight. for example some sunscreens filter out a portion of ultraviolet b (uvb) rays but don't block any ultraviolet a (uva) rays. bear in mind the spf number on a sunscreen label is virtually meaningless to a consumer. it refers to the percentage of uvb rays screened out but the number doesn't correlate to a specific percentage. see this webmd article for a detailed explanation. the united states food and drug administration (fda) recently put out new labeling rules for sunscreen that might help you find one more suitable to your occupation. hope this helps!
i take steps to avoid sun tan even then my face get tanned even when i put hat ansd sun screen spf 30 so what can i do? . as i am in construction field so i need to avoid sun tan so pls get some lotions or pills or steps to avoid it