Glitched Health

Despite seeing Link's health tick down by quarters at least, the game actually keeps track of his health in increments of 1/16 of a heart. This is due to sources of damage that only do 1/4 heart and Double Defense. However, this leads to an interesting side effect wherein if you take a small amount of damage less than 1/4 heart, your health will appear to not tick down sometimes when you take damage. This is due to the rounding error associated with the game tracking 1/16th of a heart at a time. This most usually occurs from rolling into fire or lava because of how this type of damage works, gradually degrading your hp but the roll invincibility stops it. The only way to get rid of glitched health is to get back to full health, or die, so if you have it you usually have to work around it in your setups.