There is no difference between a bump and a lump.
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A lump usually refers to a mass or swelling beneath the skin, commonly due to tissue growth or inflammation. On the other hand, a bump is a raised area on the skin that can be caused by various factors such as injury or insect bites. Essentially, a lump is a more generalized term for any abnormal growth or swelling, while a bump is more specific to a raised area on the skin.
A lump is a general term for a swelling or bump, while a knot typically refers to a tightly intertwined mass or tangle. Lumps can be related to many different conditions, including inflammation or tumors, while knots often refer to muscle tension or tightness.
A hard lump that forms after biting your tongue is likely a minor injury called a mucocele. It occurs when a salivary gland duct gets blocked or damaged, causing saliva to accumulate and form a cyst-like bump. In most cases, it will resolve on its own within a week or two.
You may be experiencing a cyst or a pimple in that area, which can be caused by blocked hair follicles or sweat glands. It's best to have it checked by a healthcare provider to determine the exact cause and to receive appropriate treatment. In the meantime, keeping the area clean and avoiding tight clothing may help reduce discomfort.
An arachnoid cyst is typically located within the brain, so it would not appear as a lump on the head. It is a fluid-filled sac that develops between the brain or spinal cord and the arachnoid membrane, one of the protective coverings of the brain. Symptoms may vary based on the location and size of the cyst.
The scientific word for bump is "papule."