Causes of Lump on Leg Under Skin

There are many possible causes of lump in leg under skin. Most of these lumps are hard, round and reddish; some are more prominent at night. Some people notice a hard lump in lower leg that is not painful, while others can feel them on the lower leg on the calf under the skin. Below are possible causes of lump on leg under skin.

Bone Cancer:

Bone cancer occurs when there is a problem with the cells that produce bone, and this type of cancer can cause lump in leg under skin. It is the malignancy the happens in the bone.

Symptoms of bone cancer are: swelling, night pains and tender lumps that may appear in any part of the body. The most common treatments for bone cancer are surgery, amputation, limb sparing surgery, chemotherapy and radiotherapy.

Bone Fracture:

Bone fractures may also cause the appearance of hard lump in lower leg and it is commonly called a broken bone. The common symptoms of bone fracture aside from lumps in the legs are localized pain, localized bleeding, localized swelling, bone dislocation or deformity and other symptoms that are associated with nerve damage. Treatments for fractured bones include surgery, fracture reduction by aligning the broken ends of the bones, and closed and open reduction.


Lipoma is a tumor of fat cells that usually occurs under the skin. A lump on leg under skin may be a lipoma. Lipomas are harmless and they do not require treatment. Other symptoms may include skin lumps that are soft yet painless, lumps on the arm and thigh, shoulder lump, cosmetic defects and multiple lumps that may appear under the skin.


A lump in leg under skin may be a boil; it is a large infection of the hair follicle. Boils occur due to bacterial invasion that penetrates the follicle, thus causing infection. Boils are also known as skin abscesses or furuncles.

Poor hygiene and certain diseases that weaken the immune system can cause boils. Symptoms of boils may include swollen or reddened lumps that develop in the skin. The swelling or the lump appears on the surface of the skin with a head of pus. Boils that are further infected may lead to a more serious condition like septicemia. A boil can burst and drain the pus on its own which will lead to its healing process. Some boils though need treatment to ensure proper healing.

Erythema Nodosum:

Small lumps in lower legs may be caused by erythema nodosum; this is a very uncomfortable condition that involves rash-like symtpoms. This condition occurs in connection with different kinds of infections or due to extreme drug sensitivity. The lumps usually begin as painful red nodules with closed lesions that may feel warm to the touch.