A dark patch happens to appear on different parts of skin as a result of hyper-pigmentation, and you can treat this problem following the following home remedies.
-Cut potatoes in slices and squeeze lemon juice over them. Now use these slices to rub on the affected part of the skin. Just leave it for several minutes and then wash it off. Daily application of this remedy can help you heal this skin ailment.
-Take a cotton ball and soak it in apple cider vinegar. Rub it on the affected part of the skin and leave it for several minutes. You will notice very fast recovery from this problem with the help of apple cider vinegar.
-Make a paste using turmeric powder and lemon juice and apply it over your skin. Leave it for several minutes and wash it off with fresh water.