Health Bar Mod pops up when you get hurt and disappears from your face after healing. It improves previous deficiencies: modify your health, no displaying your hearts exactly ( after crossing dimensions) or hearts can also be a bit small on high resolution displays, so it can be easily to lose track of health. It always showes off your correct health, even if a mod has adjusted it. Highly configurable and modify the size of the bar and text independently, or get rid of them totally.
It is also able to present the bar when you are not hurt, if you want to. The bar also takes up shaking as your health turns into low, giving you an additional notice that you might want to run for it. This can be tweaked or disactivate entirely.