There’s a natural part in most heads of hair (a way that your hair naturally falls, leaving a small line of scalp bare). You can find it by wetting your hair, then combing it straight back when it’s still damp. Wherever the hair naturally falls is your natural part.
If you’re used to parting in that same part, you’ll notice your hair feeling or even looking thin at that parting. When you notice this, you want to change your part.
If you love the side it’s parted on, keep it but make a really slight subtle change in that part. One, to reduce the look of thinning. Two, it will make your hair look fuller.
It may take time to adjust your part, so to get used to the new parting, take a bobby pin and pin that part. It is best to find the new parting right after you get out of the shower.
Or, when you get out of the shower, start blowdrying your front fringe hair in a criss cross motion to neutralize your front hair line and parting then, find your new parting dry and pin away.
Pin away until your parting gets used to the new area.