if i use healing

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.

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.

Another wrong way might be misinterpreting the characters' motives. If you assume things about the characters without carefully following their development throughout the novel, you're using it wrongly. For example, if there's a character who seems cold at first but is actually kind-hearted deep down, and you don't pick up on the cues in the story, you're not using the novel as it should be. Also, using it just to show off that you've read it without actually enjoying or learning from it is wrong. You should read it for the experience, the emotions it evokes, and the insights it offers.

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.

Some ancient Greek pottery often depicted erotic scenes that could be considered in a way as part of an artistic narrative that might have had elements of 'healing' in the sense of expressing cultural and human aspects. Also, certain works of literature, like some of the more sensual poems in Persian literature, can be seen as using erotic stories in an artistic and potentially healing way by exploring human emotions and desires.

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.

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.

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.

There might be a mentor figure in the novel. This person could be someone who is supposed to guide the main character in using the healing magic correctly but for some reason, the main character doesn't listen and continues to use it the wrong way.