Having itchyness under my pinnes that wont go away even with lotion when I wear underwear it start to itch and have to put lotion for it to not itch anymore

You . You may be allergic to the detergent you are washing your underwear with; or if you are wearing new underwear made out of a different type of fabric that you normally use, that could be the cause. Lastly consider jock itch. You could try an over the counter anti-fungal cream like clotrimazole. If no relief visit a medical professional. Best of luck.