Welcome to the forum Austin, so it looks like this is bothering you for years.... Well you condition looks like Neurodermatitis to me so mild medications like topical cortizone won't help. You may need stronger prescription topical steroids than just cortisone or at-least medium potency steroids. As chronic cases of neurodermatitis may also be associated with superadded bacterial or fungal infection adding antibiotics and a fungal cream might also help. Remember: The more you scratch the more it itches and the more it itches the more you scratch. So the most important thing in the management of neurodermatitis is to avoid scratching. For this you should take anti-itch medications (at-least 2 weeks). You may take oral medication containing levocetirizine, cetirizine (mild sedative,avoid driving) or loratadine or any other that your derm suggest.
Nothing will work unless you avoid scratching so first stop scratching. Also avoid tight occlusive clothing. If you have any questions feel free to ask.