how not to use healing magic manga

You should first have a clear understanding of the rules and limitations of the healing magic system in your manga. If you don't, it's easy to misuse it.

Well, one way is to have clear rules and limitations for the magic. That way, you don't accidentally overuse or misuse it for plot convenience.

Well, it could result in a distortion of the magical balance in the story's world. Healing magic is often part of a larger magical ecosystem in fictional settings. When it's misused, it might tip that balance. Say, if it's overused in the wrong way, it could deplete the natural magical resources that are meant to be conserved for other types of magic. This could then lead to a shortage of magic for other important functions like protection spells or divination. Also, the wrong use might cause a corruption of the magic itself within the novel's lore. It could mutate into a form that is unrecognizable and uncontrollable, causing all sorts of unpredictable and dangerous effects.

They might notice that the patient's condition is not improving but getting worse. If they are trying to heal someone, but instead the person's pain increases or their wounds seem to fester more, that's a clear sign they are using the magic wrong.

One example could be using the wrong incantation. If the incantation for a healing spell is mispronounced, it might not work as intended or could even have negative effects.

It creates conflict. When the characters use healing magic the wrong way, it often leads to new problems that need to be resolved. This drives the story forward as other characters have to step in to fix the mess.

It really depends on the particular manga. Some depict Mash having the ability to use magic, while others might not. It all comes down to the creator's imagination and the story's requirements.

One consequence could be that it may cause unexpected side effects on the patient. For example, instead of healing a wound, it might accelerate the spread of an infection if used wrongly.

One wrong way could be using it without proper training. In the light novel, it might be shown that if a character tries to use healing magic without learning the correct incantations or focusing their mana properly, it could lead to ineffective healing or even backfire and cause harm. For example, the character might end up draining their own energy instead of transferring it for healing.

Perhaps using the wrong incantations or gestures. In the novel, the proper form of using healing magic might be very specific. If the user gets these wrong, it could lead to ineffective healing or even harmful consequences. For example, a wrong gesture might redirect the magic to the wrong part of the body, or an incorrect incantation could change the nature of the magic from healing to something else entirely.