If you do not feed or visit your monster on Moshi Monsters, its health will go down and it will become sad and eventually will become ill.
Well, the only way to lower your monster's health on Moshi Monsters would be by not feeding it. Your monster will eventually get sick.
Feed it
To get rid of your monster's health on Moshi Monsters, do not play with your monster for several days. Do not feed it, do not buy things, do not play games. Both the health and happiness of your monster should go down.
You need to feed your monster.
To make your Moshi Monster sick, do not play Moshi Monsters for a long time. If you do play Moshi Monsters, do not do anything that will add Health or Happiness to your monster, such as feeding your monster, playing games, or going walking in Monstro City.
You should feed your Moshi Monster until its health goes up and it is happier.
A Moshi is what the monsters are called: "Moshi Monsters". You can not catch a Moshi Monster, you adopt a Moshi Monster when you start your Moshi Monsters account. Choose carefully as you can not change your Moshi Monster once you have verified the account.
Feed your monster
There is no Carrot Island on Moshi Monsters.
Yes, there is a Moshi Monster with the name dodococobird23 on Moshi Monsters.
No, Moshi Monsters do not die. If you do not log into your account for a long time, or if you do not feed your monster, your monster's health and happiness levels go to 0. To increase your monster's health and happiness, just feed it, take it shopping and for walks, and play games.
No, Scummi Bears give +30 Health points and +10 Happiness points when your Moshi Monster eats them.