Medics have coined the term “itch-scratch cycle”—a self-perpetuating loop in which skin irritation (the itch) leads to scratching. Scratching provides temporary relief by triggering pain signals that override the itch, but it also releases chemicals that increase inflammation. This, in turn, damages the skin barrier, leading to even greater irritation and stronger itching.

Rabbi Elimelech Biderman uses this concept to illustrate the skin afflictions described in this week’s Torah portion:

“When a person will have on the skin of his flesh a swelling, a scab, or a bright spot…” (Leviticus 13:2)

Why these specific afflictions?

The Talmud (Arachin 16a) teaches that they result from the sin of speaking negatively about others—lashon hara.

A person afflicted with tzara’at may scratch repeatedly. For a brief moment, it feels relieving, as though the discomfort is being eased. In reality, however, the scratching only worsens the condition. The more one scratches, the more the skin is damaged, deepening the irritation and prolonging the pain.

So too, one who speaks lashon hara imagines that he is gaining something—validation, attention, or a sense of superiority. That perception is the trap: what feels helpful or justified is often the harm itself. Like scratching, it provides short-term relief while causing long-term damage.

The more a person engages in negative speech, the more it erodes character, relationships, and spiritual well-being. What initially feels beneficial ultimately proves destructive.

In this sense, lashon hara forms its own “itch-scratch cycle.” The urge to speak leads to temporary satisfaction, which strengthens the habit and deepens the harm. Not only does it damage others—it wounds the speaker as well. Like any habit, the more it is indulged, the harder it becomes to stop.

Through tzara’at, the Torah teaches a powerful lesson: sometimes the very thing that feels relieving is, in fact, the source of the problem. True healing begins when a person learns to stop “scratching,” even when the urge feels justified.

The next time you feel the “itch” to speak about what you perceive as a flaw in someone else, resist the temptation. You—and the other person—will both benefit. Instead, replace that impulse with kind words—words that heal rather than harm.

Over time, transforming negative habits into positive ones leads to a deeper sense of well-being. The power of positive speech is profoundly uplifting. Strive to see the good in every person and every situation.