Increae your Health

Crystal Hearts

You can use a crystal heart to permanently increase your health by one heart, using this method you can adquire an extra health bar. You might find an already crystal heart in a structure or find 9 Crystal Heart Fragments from breaking mob spawners or as loot inside of important structures such as the Mythical Dungeons to craft one Crystal Heart.

Shiel Hearts

Consuming Golden Apples will give you a shield heart.

Health Boost

The Health Boost potion effect from the Moqueca dish from Crockpot as well as other dishes will give you extra hearts for a time.