Plant swellings, also known as edemas (6 letters), are abnormal growths on plants caused by a variety of factors such as nutrient deficiencies, insect infestations, and fungal infections. These swellings can be found on the leaves, stems, and roots of plants and can range in size from small bumps to large, woody galls. Edemas can cause stunted growth, discoloration, and even death in some cases.