Excess tension on the skin is the short explanation for stretch marks. This happens when you either lose or add weight, thereby leading to stretching of the skin, and then stretch marks. Stretch marks can be annoying and embarrassing, and most people have spent thousands of naira on creams, pills to take care of this skin, all to no avail. INFORMATION NIGERIA hereby bring to you reasons this stretch marks might be persistent. The one reason we think your stretch mark do not want to leave despite trying a lot of medication is GENETICS. You probably have genes for stretch marks, which were inherited. We think thats why its hard to eradicate stretch marks. Its advisable to use coconut oil to massage the affected areas, this reduces it to a great extent.