I've a white bump on the inside corner of my left eye on the pink flesh near to nose for years and no pain. Now seems like it's popping n slight pain?

Inflamed pinguecula. You may have had a pinguecula (a white /tan bump on the white of the eye related to sun exposure /allergies/ and other irritants) that is now inflamed. If the eye is red and painful you should get an eye exam to determine the exact cause and etiology of your pain.