In most cases, arm fat appears as a result of accumulation of excess fat in the arm area. Undoubtedly, it is quite difficult to burn the excess fat in the arms, unlike in other body parts, where the fat deposition is easy to shed. Hence, flabby arms result from the gradual deposition of fat in the arms.
Another reason for the appearance of arm fat is aging. After the 20s, our body tends to store more fat in various parts and the lean muscles start to decrease. So the fat accumulation becomes more than the lean muscles, one of the main causes of flabby arms.
Also, arm fat can be caused by decreased metabolism rate as well. The metabolism rate decreases with the growing age, which means burning fewer calories, and it ultimately leads to arm fat.
Fat accumulation also occurs in cases of a lack of physical activities and irregular workout.