Cysts: Overview

A cyst is an abnormal growth consisting of a closed sac filled with fluid or solid material.  The material within the cyst is usually produced by the cells that make up the lining, or wall, of the cyst.  Cysts form for a variety of reasons, depending to some degree on the tissue involved.  Some cysts that form in the adrenal glands are caused by bacterial infections or by parasites.

Causes and Development

Most cysts are benign and caused by plugged ducts or other outlets of bodily secretions which cause a fluid build-up.  However, some cysts may be tumors and are formed inside tumors – these can be potentially malignant.  Other causes include:
  • various genetic conditions
  • cell defects
  • impact injury that breaks a vessel

Signs and Symptoms

There are many possible signs and symptoms of cysts, depending on the type of cyst.  Often the patient becomes aware of an abnormal lump under the skin.  Breast cysts may be noticeable when the breasts are examined by touching them, and are often painful.

Some cysts in the brain can cause headaches, as well as other symptoms.  Other internal cysts, such as those in the kidneys or the liver, may go unnoticed until an imaging scan (X-ray, MRI scan, CAT scan, ultrasound) detects them.

The most common type of cyst is the sebaceous cyst.  Also called epidermoid, pilar, and vulvar cysts, they are harmless, slow-growing bumps under the skin, often appearing on the scalp, face, ears, back of the neck, back, upper chest or groin area (typically the vulva or labia).  They are usually rounded, non-tender and of varying size.

Any redness, tenderness, or increased temperature of skin over area may indicate an infection.  Grayish white, cheesy material from the cyst (if drained or squeezed) may have a bad odor.

Conditions that suggest Cysts:

Symptoms - Immune System

Risk factors for Cysts:


Tapeworm Infection often increases risk of Cysts Tapeworm Infection

A tapeworm cyst can settle in the brain, eye, liver, or elsewhere.

Recommendations for Cysts:


Alkalizing Agents/Diet may help with Cysts Alkalizing Agents/Diet

Some doctors believe that a tendency to form cysts occurs more frequently in those with an acidic body pH.  If so, an alkalizing diet may help.

Lab Tests/Rule-Outs

Test for Food Allergies may help with Cysts Test for Food Allergies

Generalized cysts may be due to allergies.  Allergy testing may be useful only if there are other allergy symptoms also.


Surgery often helps with Cysts Surgery

A very large cyst that causes significant symptoms can be surgically removed, or drained by inserting a needle or catheter into the cavity.

Sebaceous cysts are usually ignored unless they become bothersome or infected.  An infected cyst can form into a very painful abscess for which surgical incision and drainage is usually necessary for pain relief.  Excision of the cyst and the surrounding sac may be necessary to prevent recurrence.  Sebaceous cysts may disappear spontaneously, or remain in place without causing any problems.


Strong or generally accepted link: often increases risk of
Strong or generally accepted link:
often increases risk of
Definite or direct link: strongly suggests
Definite or direct link:
strongly suggests
May be useful: may help with
May be useful:
may help with
Moderately useful: often helps with
Moderately useful:
often helps with