How do I get arm muscle?

How do I get more mucsles especially in da arm ??
Quick and fast that takes for about a week with results I need help!!

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You are not going to get results within a week unless you roid out. But I suggest that you do burn outs with weights and that will tone your muscle and it will make it look bigger and you will look stronger. Do bicep curls.

Nothing can happen in a week, lol, are you preparing for an arm wrestlng contest?

I'd say if you start arm curls you could see results in a month. Three times a week, do 4 sets of curls. Increase weight with each set and do each set to failure. Start with 5 lbs, 8 lbs, 10 lbs, 12 lbs. For your warm up, at 5 lbs, you can probably do about 25 curls. Try to gradually increase so with your heaviest and last (most important ) set you can do about 6 reps.

Other people who work out might have slightly different progressions but this works well for me.