What is the term used for a solid bump that can be felt but is smaller than a tumor?

The term "nodule" refers specifically to a solid, raised bump that can be felt under the skin. Nodules are typically characterized by their greater size compared to other skin lesions but remain smaller than tumors. They can vary in shape and feel, often being firm to the touch. This classification is crucial for understanding skin conditions and their implications during examinations and treatments.

In contrast, pustules contain pus and are often associated with infections or acne, while wheals are raised, itchy areas on the skin typically resulting from allergic reactions. Bullae, which are larger fluid-filled blisters, differ significantly in their composition and presentation. Understanding these distinctions is important for accurate identification and treatment in esthetics and dermatology.