Pregnancy cravings are temporary, normal, and usually harmless. Enjoying them in moderation is one of the genuine pleasures of pregnancy. Most cravings do not indicate a nutritional problem, and satisfying them is not going to derail your health or your baby's development.
The one craving pattern that requires prompt attention is pica — craving non-food items like ice (pagophagia), dirt, clay, or chalk. Pica can indicate iron or zinc deficiency and the substances themselves can be harmful. If this describes you, tell your provider without embarrassment — it is more common than most people realize and is usually easily treated.
For related guides, read about pregnancy weight gain for recommended gain targets, pregnancy constipation if your diet changes are affecting digestion, and pregnancy heartburn if spicy food cravings are causing reflux.