13 Vacuum Bell Therapy Side Effects in [2023]: Is It Safe?

Written by Mihail Veleski

Last updated on: April 25, 2023

Generally, vacuum bell therapy for pectus excavatum is considered very safe. Over the years, just a few problems have been reported.

Comparatively, the extensive use of Nuss procedures for correcting sunken chests raised the frequency of surgical complications

Plenty of studies reported increasing rates of near-fatal complications. Surgeries can cause injuries to the heart and mammary vessels.

Because of this evidence, the vacuum bell therapy for fixing pectus excavatum has made this alternative therapy a focus of interest for us with pectus excavatum.

13 Most Common Vacuum Bell Side Effects List

Below is a list of every single possible side-effect that has been reported in the history of vacuum bell therapy use:

  • Dizziness
  • Bruising
  • Gynecomastia
  • Irritated Nipples
  • Sore chest muscles
  • Back pain (dorsalgia)
  • Crafted skin
  • Blisters
  • Loose skin
  • Small red circular non-raised patches (petechial bleeding)
  • Blood droplets
  • Acne
  • Tingling of the upper extremities (transient paresthesia)


Vacuum bell treatment can result in dizziness. The patient should stay seated or supine at the beginning and end of a treatment session. I experienced that slow pumping and depressurization of the device reduce the risk of dizziness.

Once the vacuum bell is under the negative pressure you desire, you can stand up carefully and continue your day.


If your skin turns blue after applying the suction bell, this is a hematoma or bruise - subcutaneous hematoma. A high percentage of vacuum bell patients have such hematomas. This is nothing to be afraid of.

These hematomas usually go away very quickly and recover on their own. 

In some severe cases, it may be dark red to purple. 

However, if dark (black) hematomas occur, please seek medical help. The presumed cause is that blood temporarily pools under the vacuum bell.

To treat this, remove the Vacuum Bell after about 20 minutes, wait a few minutes and then reapply the vacuum bell. Decrease the negative pressure.

Your skin will get used to the suction bell therapy within a week. These side effects are temporary and usually disappear with suitable daily use adaptation.


In some adolescents and young men using the vacuum bell, enlargement of the nipples has been noticed, as if female breasts were beginning to develop. 

The supposed reason is that the repeated touch stimulation of the vacuum bell causes breast growth. 

If this starts to bother you, please consult your doctor. Depending on the severity, the doctor will decide whether you should take a break for several weeks or if drug therapy is required. However, this occurs very rarely. 

Irritated Nipples

This is caused because of nipple contact with the vacuum bell. If the edge of the vacuum bell crosses the nipples, it may lead to irritation.

To prevent this, you can try to offset the vacuum bell slightly to one side so that one nipple is fully covered and the other remains completely bare.

Sore Chest Muscles

This can happen because the chest and rib muscles stretch during vacuum bell treatment. You can pause the vacuum bell treatment for a few days to stop this feeling.

Shorter spans of treatment and weaker negative pressure also help.

Irregular Back Pain

This may happen because of bending moments. The attachment of the ribs partly provides the counter forces to the spine.

To prevent this, shorter treatment lengths and weaker negative pressure are suggested.

Chafed Skin

This may happen from the skin chafing on the polycarbonate window, especially when the vacuum bell is worn during strenuous physical activity. You should rest a few days until the skin is healed if it happens. If you don’t, it can lead to bleeding because of the negative pressure.

Shorter lengths of treatment, weaker negative pressure, and less movement while wearing the vacuum bell will help with this.

Itchy Skin Blisters 

Skin blisters may also appear. They are usually clear to light yellow and, less commonly, slightly reddish. Like most side effects, it may require a break of several days until the blisters have resolved. If you don’t rest, they may bleed under negative pressure.

Loose Skin

This may occur from fluid collecting in the tissues.

To prevent this, use shorter lengths of therapy and weaker negative pressure.

Blood Droplets

Blood droplets on the skin are caused mainly by the extreme negative pressure of the vacuum bell. This occurs very rarely. To prevent this, shorten the length of treatment and weaken the negative pressure.


This is also known as pinpoint bleeding in the skin. This may result from negative pressure. It is usually 2 to 4 millimeters in diameter, depending on the severity.

In a lot of cases, this is unavoidable. Usually takes a few weeks to fade after finishing the treatment.


Acne can develop in the suction zone of the vacuum bell. This is extremely rare. However, proper skin care on the chest is critical.

Tingling arms

Tingling arms is a predecessor to numbness. This is most common in the extensor muscles of the upper arms and less common in the forearms.

To stop this, you should shorten the treatment duration and weaken the negative pressure.

Can Vacuum Bell Cause, Collapsed Lung?

Vacuum bell therapy can’t cause a collapsed lung (tension pneumothorax). Some people believe in this because tracheal suctioning is directly related to pneumothorax.

However, tracheal suctioning can’t be done with a vacuum bell. It is done by a suction device (completely different than a vacuum bell) to aspirate secretions from the airways during surgical procedures.

Scientific evidence shows that Rehbein’s method causes a collapsed lung during an operation. This method is one of the few surgical procedures to repair pediatric pectus excavatum.

Pectus excavatum patients need to be cautious of the possible occurrence of pneumothorax, especially during minimally invasive procedures.

The Bottom Line

Although rare, vacuum bell problems may still be annoying for some people. This problem occurs primarily because of excessive vacuum bell use and intense negative pressure in the first weeks and months of treatment.

The vacuum bell intensity of application should be gradual. To prevent skin problem side effects, it is essential to cultivate a skincare habit.

If you have concerns or need to deal with a problem caused by the vacuum bell, don’t hesitate to contact me personally or write a comment in the section below.

Thank you for reading!

6 Sources

Article by:

Mihail Veleski

I am Mihail Veleski, the person behind this website. Established in 2015, Pectus Excavatum Fix (Now Mr. Pectus), has helped thousands of people improve their sunken chest deformity, both physically and mentally. I pride myself on ensuring the information and methods I share are tried by me and backed by research. I improved my concave chest and rib flare deformities non-surgically.

4 thoughts on “13 Vacuum Bell Therapy Side Effects in [2023]: Is It Safe?”

  1. hi I am 14 I suffer from the same problem I do Physical therapy start going to gym and I bought a vaccum bell 22 days ago I try to use it as much as I can and I have red all the things about it but , I have to ask isn’t it better if I wear it more than 2 hours twice a day? I am going to start to wear it to sleep to but I have to ask if it’s ok or it may cause problems. And one more thing is have you used the braces and if yes did it help cause I thought about buying those too I would do anything to avoid the surgery but I don t want to live like this always under the pressure of people making fun of my chest.

    • Hello David,

      First of all, I am glad to hear that you started exercising from such a young age. I am impressed by your determination to improve your pectus excavatum deformity. You are doing exceptionally well.

      Also, it is impressive to hear that you have already invested in a vacuum bell. I would highly recommend you start the vacuum bell therapy gradually. It would be best if you didn’t force yourself too harshly with applying the device because it can irritate your skin a lot, preventing you from wearing it in the days that come. Eventually, it would be ideal to wear it for as long as possible during the day, as long as you don’t experience any skin problems.

      I highly recommend you start sleeping with the device applied to your chest if you can handle it and sleep without a problem. I wrote detailed articles about these topics, which you can check.

      I used the LaceIT and Neo G pectus excavatum braces, and they helped me tremendously in improving my poor pectus posture and rib flare. If you have the budget, I would recommend you invest in a LaceIT brace as well.

      However, see how the vacuum bell improvement goes. You may not need a brace unless you have severe rib flaring. I believe that you can improve your deformity without surgery.

      Please, don’t let it bother you psychologically, David! You’re on a fantastic self-improvement journey that will help you become the strongest version of yourself.

      You can message me anytime at mihail@pectusexcavatumfix.com. Take care, and thank you for your comment!


  2. I have used the vacuum bell for a year and got good results. I wasn’t completely disciplined with my usage either. However, I did notice some strain on my left side of my chest and was worried about an effect on the heart. When I stopped usage, I still had that feeling, but since have taken cayenne pepper daily and it has cleared up any strain effects.
    Anyone have a comment on this?
    I just want the vacuum bell to be safe and I am not sure if there has been anyone to look at long term use.


Leave a Comment



Learn everything you need to know about the pectus excavatum deformity from A-Z. See how I managed to improve my pectus excavatum deformity non-surgically.

Sign up and discover how you can improve your physical and mental wellbeing once and for all.