Large cyst on back: Pictures, Causes, Types, Treatments, and Prevention

27.08.202313.06.2023 by alexxlab

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Pictures, Causes, Types, Treatments, and Prevention

A cyst is a small pocket of tissue filled with air, fluid or other substances. Cyst maybe caused by genetics, inflammation, infection or other issues. They are usually benign but may need treatment if complications arise.

A cyst is a sac-like pocket of membranous tissue that contains fluid, air, or other substances. Cysts can grow almost anywhere in your body or under your skin.

There are many types of cysts. Most cysts are benign, or noncancerous.

Whether a cyst needs treatment depends on a number of factors, including:

the type of cyst
the location of the cyst
if the cyst is causing pain or discomfort
whether the cyst is inflamed or infected

If you’re not sure if you have a skin condition, you can take a picture and send it to an online dermatologist.

Cysts can vary in appearance depending on their type and location. Here are 11 types of cysts.

Warning: Graphic images ahead.

Epidermoid cyst

An epidermoid cyst is a small, slow growing, benign cyst most commonly found on the face, head, neck, back, or genitals.
It’s usually caused by a buildup of keratin under the skin.
It looks like a skin-colored, tan, or yellowish bump filled with thick material.
It may become swollen, red, or painful if it’s inflamed or infected.

Sebaceous cyst

Share on PinterestPhotography courtesy of Klaus D. Peter, Wiehl, Germany/Wikimedia Commons

A sebaceous cyst is found on the face, neck, or torso.
It’s usually caused by trauma or damage to the sebaceous glands, such as from cuts or surgical wounds.
A large cyst may cause pressure and pain.
It’s noncancerous and very slow growing.

Breast cyst

Share on PinterestPhotography courtesy of Nevit Dilmen/Wikimedia Commons

Most breast lumps (such as cysts) are noncancerous, but there are many possible causes for a lump in your breast.
Instead of performing a breast self-exam, it’s important to be familiar with how your breasts typically feel so you’re aware of changes. This way, you’re more likely to notice changes right away.
You should make an appointment to see a healthcare professional if:
- you discover a new lump
- an area of your breast is noticeably different than the rest
- a lump changes or grows larger
- you notice unexpected discharge from the nipple
- you have an inverted nipple, and it wasn’t always inverted

Ganglion cyst

A ganglion cyst is a round, gel-filled lump of tissue that usually appears along tendons or joints, especially in the hands, wrists, ankles, and feet.
Fluid accumulation can occur due to injury, trauma, or overuse, but often the cause is unknown.
A ganglion cyst is common, harmless, and doesn’t cause pain or problems unless it grows and puts pressure on other structures.

Pilonidal cyst

A pilonidal cyst is a common skin condition that forms in the cleft at the top of the buttocks. It typically occurs after puberty.
It’s believed to be caused by a combination of changing hormones, hair growth, and friction from clothes or from spending a long time sitting.
It consists of a small hole or tunnel in the skin that may become infected and fill with fluid or pus.
Signs of an infection include:
- pain when sitting or standing
- red or sore skin around the area
- pus or blood draining from the abscess, causing a foul odor
- swelling of the cyst
- hair protruding from the lesion

Ovarian cyst

Ovarian cysts are fluid-filled sacs that develop on one or both of the ovaries.
They may develop as a normal part of the reproductive cycle or be pathologic.
They may be asymptomatic or painful.
Symptoms include:
- abdominal bloating or swelling
- painful bowel movements
- pelvic pain before or during the menstrual cycle
- painful intercourse
- pain in the lower back or thighs
- breast tenderness
- nausea
- vomiting
Severe symptoms such as sudden, sharp pelvic pain, fever, faintness, or dizziness are signs of cyst rupture or ovarian torsion.

Baker’s (popliteal) cyst

A Baker’s cyst is a fluid-filled swelling that causes a lump at the back of the knee.
This condition is due to a problem that affects the knee joint, such as arthritis, inflammation from repetitive stress, or a cartilage injury.
Symptoms include:
- mild to severe pain
- tightness
- limited range of motion
- swelling behind the knee
- bruising on the knee and calf
- rupturing of the cyst
A Baker’s cyst often doesn’t need treatment and will go away on its own.

Pilar cyst

A pilar cyst is a noncancerous, skin-colored, round bump that develops under the surface of the skin. It’s usually located on the scalp.
This type of cyst is caused by protein buildup in a hair follicle.
It’s painless, firm, smooth, and slow growing.

Mucous cyst

A mucous cyst is a fluid-filled swelling that occurs on the lip or the mouth.
It develops when the mouth’s salivary glands become plugged with mucus.
It’s commonly caused by trauma to the oral cavity, such as lip biting, piercings, and salivary gland disruption.
Mucous cysts are small, soft nodules that are pinkish or bluish.

Branchial cleft cyst

Photography by BigBill58/Wikimedia Commons

A branchial cleft cyst is a type of developmental irregularity in which a lump develops on one or both sides of the neck or below the collarbone.
It occurs during embryonic development when tissues in the neck and collarbone, or branchial cleft, develop differently.
In most cases, a branchial cleft cyst isn’t dangerous. However, it may cause skin irritation, skin infection, or — in very rare adult cases — cancer.
Symptoms in children include:
- a dimple, lump, or skin tag on the neck, upper shoulder, or slightly below the collarbone
- fluid draining from the neck
Children and adults may experience swelling or tenderness that usually occurs with an upper respiratory infection.

Perineural (Tarlov) cyst

A perineural cyst is a fluid-filled sac that forms on the spine.
Causes are unknown, but it may result from back trauma. Types of trauma associated with this cyst include falls, injuries, and heavy exertion.
Symptoms are rare. In these cases, it may cause pain in the lower back, buttocks, or legs.

Folliculitis (ingrown hair cyst)

Folliculitis describes a category of skin conditions that cause inflammation in a hair follicle and are usually infectious.
Ingrown hair cysts are a type of folliculitis. They start off as hairs that grow down or sideways instead of out, becoming ingrown.
Folliculitis is common among people who shave, wax, or use other methods to remove hair.
Folliculitis appears as pimple-like bumps under the skin that may be red, white, or yellow, with or without a central visible hair.
Bumps that appear near an ingrown hair are more likely to be pseudofolliculitis barbae (razor bumps) than ingrown hair cysts.
Ingrown hair cysts may become infected and appear red, warm, and tender to the touch.

Chalazion

A chalazion is a small, usually painless lump or swelling on your upper or lower eyelid.
It’s caused by a blocked meibomian gland. The meibomian gland is a type of oil gland.
It may be red, swollen, and painful if an infection is present.

Cystic acne

Cystic acne is the most severe type of acne, and it develops when bumps form deep underneath your skin.
It can result from a combination of hormone changes, bacteria, oil, and dry skin cells that get trapped in your pores.
Cystic acne may occur on the face, chest, neck, back, and arms. Large, painful, pus-filled bumps and nodules may form, rupture, and leave scars. They may appear red or skin-colored, depending on your skin tone.