Left Rib Hard Lump: Pain Causes and Concerns - Surgery

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A hard mass protruding from the left rib cage?


Hello Doctor, I have noticed a hard lump under my left rib cage, just below my armpit, while touching my chest these past few days.
It feels arc-shaped and is slightly painful when I press on it.
I've been touching it repeatedly over the past few days.
Could the pain be due to this? Also, could this possibly be a tumor, or is it related to my upcoming menstrual period? I would appreciate your clarification on this matter.
Thank you! I'm really worried...

Su, 10~19 year old female. Ask Date: 2021/07/22

Dr. Yu Mingchang reply Surgery


Hello, please take the time to visit the general surgery outpatient clinic at Changhua Hospital, Ministry of Health and Welfare, to have your health checked.

Reply Date: 2021/07/22

More Info


Dear Patient,
Thank you for reaching out with your concerns regarding the hard lump you’ve discovered under your left rib cage, near the armpit. It’s understandable to feel anxious about any new physical findings, especially when they are accompanied by pain. Let’s break down your symptoms and potential causes.

First, the presence of a hard lump in the area you described could be due to several factors. One common cause is a benign condition such as a lipoma, which is a fatty tumor that is generally harmless and can feel firm to the touch. Another possibility is a swollen lymph node, which can occur in response to infection or inflammation in the body. Given that you mentioned tenderness when pressing on the lump, this could suggest some degree of inflammation or irritation in the surrounding tissues.

It’s also important to consider your menstrual cycle. Hormonal changes that occur before menstruation can lead to breast tissue changes, including tenderness and the formation of lumps. This is often due to hormonal fluctuations that can cause the breast tissue to swell or become more sensitive. However, since you mentioned that the lump is located under the rib cage and not directly in the breast tissue, this may be less likely to be the sole cause.

Regarding your concern about the possibility of a tumor, while it’s natural to worry, not all lumps are cancerous. Tumors can be either benign or malignant, and the characteristics of the lump (such as its size, shape, and whether it is fixed or movable) can provide important clues. If the lump has been present for a short time and is painful, it is more likely to be related to inflammation or infection rather than a malignant process. However, it is crucial to have any new or concerning lumps evaluated by a healthcare professional.

In terms of the pain you are experiencing, it is possible that the tenderness is exacerbated by your repeated touching of the area. This can lead to localized irritation and discomfort, which may not necessarily be indicative of a serious underlying condition. However, if the pain persists or worsens, or if you notice any additional symptoms such as fever, unexplained weight loss, or changes in your overall health, it is essential to seek medical attention promptly.

To address your concerns effectively, I recommend scheduling an appointment with your healthcare provider. They may perform a physical examination and, if necessary, order imaging studies such as an ultrasound or CT scan to further evaluate the lump. Additionally, they may consider blood tests to check for signs of infection or other underlying conditions.

In summary, while the lump you’ve discovered could be due to a variety of benign causes, it is essential to have it evaluated by a medical professional to rule out any serious conditions. Your health and peace of mind are paramount, and addressing these concerns with a healthcare provider will help you gain clarity and appropriate care.

Take care, and I wish you the best in your health journey. Please do not hesitate to reach out if you have further questions or concerns.

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