Oral Lichen Planus: This condition is characterized by the presence of white, lacy patches; red, inflamed tissues; or open sores on the tongue and inside the mouth. The scalloped appearance can be due to the chronic irritation and inflammation, and the bumps could be part of the lichenoid reaction.

Geographic Tongue: This condition presents with areas of depapillation on the tongue surface, giving it a "geographic" appearance. The scalloped edges of these areas could be mistaken for bumps, and the condition can sometimes cause discomfort.
Fissured Tongue: Characterized by deep grooves or fissures on the tongue's surface, which might give a scalloped appearance, especially if the fissures are shallow and accompanied by small bumps or papillae.
Oral Candidiasis (Thrush): While more commonly associated with white patches, thrush can cause redness and inflammation that might lead to a scalloped appearance of the tongue, with bumps potentially being part of the fungal infection or the body's reaction to it.

Squamous Cell Carcinoma: Although less common, any unusual changes in the mouth, including a scalloped tongue with bumps, should prompt consideration of oral cancer, especially in individuals with risk factors like tobacco use or excessive alcohol consumption.
Lymphoma: Certain types of lymphoma can manifest in the oral cavity, including the tongue, and might present with unusual bumps or changes in the tongue's surface.

Melkersson-Rosenthal Syndrome: A rare neurological disorder characterized by recurrent, often unilateral, facial paralysis or weakness, swelling of the face and lips (usually the upper lip), and the development of folds and furrows in the tongue (fissured tongue), which could be mistaken for a scalloped appearance with bumps.
Oral Psoriasis: Although psoriasis more commonly affects the skin, it can rarely manifest in the mouth, potentially causing a scalloped tongue appearance with bumps due to the inflammatory nature of the disease.