When nodules appear on the skin, many people may not pay much attention, thinking it might just be a common allergic reaction. Although most nodules are benign, we should not take them lightly.
If the nodule is larger than 1 cm, the possibility of malignancy increases significantly, and vigilance is needed.
If the nodule grows rapidly, it is likely undergoing malignant transformation.
Soft lumps are usually benign, while hard, fixed, or solid lumps are more likely to be malignant, although this is not absolute.
Benign tumors typically have clear and movable boundaries, while malignant tumors often have unclear boundaries, are adhered to or fused with surrounding tissues, and have poor mobility.
If the nodule is accompanied by pain or discomfort, it could be a signal of malignancy.