It can happen to you when you get a little older. Your arms begin to become a little less toned and start to sag. Some people try to lose weight so that they can eliminate the loose and sagging skin under their arms. You will not be able to lose weight in just that area, but there are a number of things that you can do. It is usually women who suffer from this problem, but men will sometimes have the issue as well.

As we age we lose much of the collagen and elastin our body produces. Some people just genetically have extra fat there in their upper arms. When we were a kids, they were called "Grandma Arms". Do not despair, you have options and can get rid of flabby loose weight build muscle arms.
You should know that the arm area is one of the hardest places to lose weight. You will not be able to simply lose weight in just your arm area. There are products available on the market that claim to be able to tone up this part of your body. There is currently not enough information on whether these products actually work.
Surgery is an option for people who want to eliminate the extra skin and fat in the upper arm area. The cosmetic procedure that is used to work on this area is called brachioplasty or an arm lift. The surgery is done with general anesthesia and you will be able to go home the same day. There is a two to six week recovery time and you will most likely be given pain medication for use at home.
Another procedure that you can have in this area is liposuction. This will remove the fat from the arm area. If it is necessary, you might be able to have both a liposuction and a brachioplasty to firm up the arms. You may need a week or so off from work for this procedure.
The most sensible and safest way to get rid of that loose weight under your arm is to try and build muscle there. There are a some exercises that you can do at home or at the gym
A push up is the most common exercise that you can use for this part of your body. You can choose to do a regular push up or a wall push up that will tone the muscles under the arms.
Dips may be another good exercise that will work on this part of your body. You sit on a chair or bench and lift yourself off of the chair with your arms and dip below the chair and then back up again. If you work with these exercises, you might find that you are able to build the muscle under your arms in no time at all.