Are you having back pain with any of the following?

  • Severe pain, weakness or tingling in your leg(s).
  • Difficulty stopping urination or loss of control of bladder or bowels.
  • Unexplained fever, nausea or vomiting.
  • A history of cancer or unexplained weight loss.

We understand that you are experiencing one or more of the health issues that might be impacting your back pain.

We recommend that you discuss these health issues with your doctor before proceeding with this program.

Once you are cleared by your doctor to do this program, we hope it helps you find relief from your back pain.

Provider photo for Eun-Ha Park

Eun-Ha Park, MD


Welcome to My Doctor Online, a website my colleagues and I developed to make it easier for you to take care of your healthcare needs. On this site you will find answers to many of your questions about my clinical practice. Also included are several online features that will allow you to e-mail me, check your laboratory results and refill prescriptions. If you are a patient who sees me regularly, you can reach my office directly at 415-833-5110.

My Offices

Daly City Medical Offices
Appt/Advice: 650-301-5800

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A stye is an inflamed, plugged eyelid oil gland. Essentially, it is an eyelid pimple. Styes will not damage the eye, but they can be uncomfortable and often cause lid swelling and tenderness. There are no drugs, pills, ointments or drops that can make a stye go away.

A chalazion is a stye that did not fully form. This firm, rubbery bump may stay in the eyelid for weeks to months. Most will eventually resolve on their own. A chalazion will not damage the eye. It may occasionally feel tender. No drugs, pills, ointments, or drops can make a chalazion go away.



  • Small red, tender bump on the edge of the eyelid.
  • The bump may grow and become more swollen.
  • Pain or tenderness at the site and immediate surrounding tissue.
  • After several days to several weeks, the stye may break open and a tiny amount of pus may drain.


  • Usually painless, hard bump or cyst in the eyelid.
  • Some swelling may be present.


A stye develops when gland openings at the edge of your eyelid become obstructed by an oil plug. This causes the gland to swell and become inflamed, often causing a red, tender bump to appear near the edge of the eyelid. Despite the redness and tenderness, the gland is usually just inflamed without any accompanying infection. A stye is essentially a pimple in your eyelid.

A chalazion develops from a stye that does not completely resolve. In some instances, the redness and tenderness from the stye will go away, but a pea-shaped bump or cyst may persist in the eyelid. This is a chalazion.

Certain eye and skin conditions can predispose you to getting styes and chalazia more frequently. They include the following:

  • Meibomiitis - chronic plugging of the glands on the edge of the lid.
  • Blepharitis - which is associated with crusty debris or flakes on the edge of the eyelid.
  • Rosacea - reddening of the skin on the cheeks and face.


If you tend to get styes or chalazia easily, apply warm compresses to your lids once or twice a day. This can help prevent oil plugs from forming in the gland openings. (See Home Treatment for tips on applying compresses.)


Most styes and chalazia do not require a visit with us because they will usually get better if you apply warm compresses at home. However, if the plugged oil gland does not resolve after several weeks of home treatment, please contact us. We will examine your lid and confirm the diagnosis. We may need to surgically remove your stye or chalazion if it does not go away on its own.

Home Treatment

We recommend the following treatment for both styes and chalazia:

  • Put a warm, moist compress on your closed eye for about 10 minutes, at least twice a day. Use a clean cloth or piece of gauze moistened with warm tap water. Alternatively, you can microwave a damp face cloth for about 20 seconds.
  • Make sure the towel is not too hot before you place it on your eyelid.
  • An ideal time to use the compress is while watching TV. You can reheat the towel if needed during a commercial break.
  • Keep in mind that hot compresses will sometimes increase swelling a little at first.
  • Always wash your hands before and after you use a compress or touch your eyes.
  • Do not rub your eyes and do not squeeze or try to open a stye or chalazion. If the stye begins to drain after using the compress, you may gently massage it to expel the discharge.

When to Call Us

You should call us if:

  • Your eyelid is very painful and the swelling and redness continue to increase despite the warm compresses.
  • The bump on your eyelid persists and you think you may need to have it drained.

In rare instances, the tissue surrounding a stye may become infected. We suspect an infection may be developing if the swelling, tenderness, and redness continue to increase despite the warm compresses. If this occurs, we may prescribe antibiotics.

Related Health Tools:


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If you have an emergency medical condition, call 911 or go to the nearest hospital. An emergency medical condition is any of the following: (1) a medical condition that manifests itself by acute symptoms of sufficient severity (including severe pain) such that you could reasonably expect the absence of immediate medical attention to result in serious jeopardy to your health or body functions or organs; (2) active labor when there isn't enough time for safe transfer to a Plan hospital (or designated hospital) before delivery, or if transfer poses a threat to your (or your unborn child's) health and safety, or (3) a mental disorder that manifests itself by acute symptoms of sufficient severity such that either you are an immediate danger to yourself or others, or you are not immediately able to provide for, or use, food, shelter, or clothing, due to the mental disorder.

This information is not intended to diagnose health problems or to take the place of specific medical advice or care you receive from your physician or other health care professional. If you have persistent health problems, or if you have additional questions, please consult with your doctor. If you have questions or need more information about your medication, please speak to your pharmacist. Kaiser Permanente does not endorse the medications or products mentioned. Any trade names listed are for easy identification only.

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