What are the painful lumps in lower back?

There are several potential causes for painful lumps or bumps in the lower back, including:

1. Lipoma: A lipoma is a benign, slow-growing tumor that develops in fat tissue. It can occur anywhere in the body, including the lower back. Lipomas are usually soft, movable, and painless. However, they can sometimes become painful if they grow large or press on nearby nerves.

2. Muscle strain: A muscle strain occurs when a muscle is overstretched or torn. This can cause pain, swelling, and tenderness in the affected area. Muscle strains can occur in the lower back due to improper lifting, sudden movements, or overuse of the muscles.

3. Sprains: Sprains are injuries to ligaments, the tough bands of tissue that connect bones together. They can occur in the lower back due to falls, sports injuries, or other traumatic events. Sprains can cause pain, swelling, and tenderness in the affected area.

4. Herniated disc: A herniated disc occurs when the soft, jelly-like center of a spinal disc protrudes through a tear in the tough outer layer. This can put pressure on nearby nerves, causing pain, numbness, and weakness. Herniated discs can occur in the lower back, resulting in painful lumps or bumps in this region.

5. Pilonidal cyst: A pilonidal cyst is a small, skin-covered sac that contains hair and debris. It typically develops at the top of the crease between the buttocks. Pilonidal cysts can become infected and inflamed, leading to pain, swelling, and drainage.

6. Abscess: An abscess is a collection of pus that forms in response to an infection. It can occur anywhere in the body, including the lower back. Abscesses are usually painful, warm to the touch, and swollen.

If you are experiencing painful lumps or bumps in your lower back, it's important to see a doctor for diagnosis and treatment. Your doctor may recommend imaging tests, such as an X-ray or MRI, to determine the cause of the pain. Treatment will depend on the underlying cause and may include pain relievers, physical therapy, or surgery.