I agree. Most parrots are afraid of gloves which can cause the biting to worsen. Also, when wearing gloves it is harder to feel exactly what is going on and it is more likely that the parrot will be injured.
I understand the feeling of needing something to protect your hands, but I assure you, parrots do not suddenly start biting for no reason. Try to figure out what is causing the change. How long have you had the bird, and how old is it? Has anything changed recently? Has the bird been biting everyone, or just one person? Is it only when a certain person is in the room, whether or not that is the person receiving the bite? Is it more at certain times of the day? Has his diet, sleep schedule, routine, cage location, or anything like that changed? Did someone get a new haircut, has the furniture been rearranged, did someone leave for college? If you cannot figure out what is causing it, I HIGHLY recommend a trip to the Avian Vet. Sometimes a change in personality is the only clue we get that something is very very wrong with our bird; the "aggression" may be caused by illness.
Another thing to consider seriously is if the bird is getting enough attention, and if he has enough things to do all day to keep that incredible mind busy. A bored parrot is a cranky parrot, and so is a lonely one! Parrots display their boredom and loneliness in different ways, this could be yours letting you know he is grumpy and upset because he has been sitting by himself doing nothing all day.