Underarm waxing is a popular and effective method for achieving smooth, hair-free underarms that can last between 2 to 6 weeks, depending on individual hair growth cycles. The procedure typically takes around 10 to 15 minutes and involves the application of warm or hot wax to the underarm area, followed by a quick removal to pull hair from the root. This method not only provides longer-lasting results compared to shaving but also leads to finer and sparser hair regrowth over time.