by David R Roisum, Ph.D
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The angle of the wrinkle is very important for troubleshooting the most common types of wrinkles. If you look close, you may see the wrinkle is at an angle because the Diagonal Wrinkle is much more common than all of the other types. Look close because the angle might be small. If you are not certain which major case you might have, such as an angle between 1 and 2 degrees, check both cases.