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A hard lump on the inner thigh could be caused by an infection, boil, tumor, trauma, soft tissue sarcoma or hidradenitis suppurtiva. Some of these causes are superficial and require little treatment, while others require... More »

Bacterial or viral infections are common causes for painful lumps on the inner thigh. These may include hidradenitis suppurativa, folliculitis, warts, herpes and syphilis. More »

A hard lump behind the left ear may indicate an infection, inflammation, trauma or a tumor, according to Healthgrades. Individuals may have one or more lumps that are hard, soft, painful or painless. More »

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An arm lump can be caused by one of a variety of conditions, including inflammation, infection, trauma or tumor growth, according to Healthgrades. Lumps can be described as nodules, bumps, tumors, cysts or contusions and... More »

An allergic reaction, a sebaceous cyst, an injury, acne, a skin infection, a tooth abscess, a boil, an ingrown hair or cellulitis can cause a lump in the cheek, according to Healthgrades. Additional causes include lympha... More »

The cause of a lump on the bone may possibly be a tumor, reports Healthline. Tumors can be either benign or malignant. A benign tumor is not cancerous but still may be dangerous and thus require treatment. Malignant tumo... More »

Some causes of a lump on a finger bone include infections, trauma, tumors and benign cysts, according to Healthgrades. Cancers and inflammatory diseases can also cause a finger lump. A patient with a finger lump should s... More »