Is Surgery Necessary for a Hard Lump After a Boil Heals? - Surgery

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The wound from the furuncle has scabbed over, but it still feels hard inside?


Hello, doctor.
About a week or two ago, I developed a boil on the inner thigh.
I saw a doctor, took medication, and applied ointment.
At one point, it was severely red and swollen, affecting my ability to walk.
After it became pus-filled, I drained it myself.
Currently, there is no redness or swelling, but sometimes there is slight pain when I press hard on it.
The wound is healing, but it still feels hard to the touch.
A doctor previously mentioned that if the lump does not go away, surgery might be necessary.
I would like to ask if surgery is essential, or can I continue taking antibiotics to resolve it? Or should I just leave it for a while, and it might disappear on its own?

Xiao Qian, 30~39 year old female. Ask Date: 2015/10/04

Dr. Xu Kaixi reply Surgery


This lump is more likely to be fibrous tissue resulting from an infection and inflammation.
Unless there is a recurrence of the infection, theoretically, the fibrotic lump should improve over time, and it can be monitored for a period.

Reply Date: 2015/10/04

More Info


When dealing with a hard lump that remains after a boil has healed, it is essential to understand the underlying causes and the appropriate management options. A boil, or furuncle, is a localized infection of the hair follicle that can lead to the formation of pus and inflammation. After the boil drains and the acute infection resolves, it is not uncommon for a firm lump to persist at the site. This lump may represent residual inflammation, scar tissue, or, in some cases, a more serious condition such as an abscess or a sebaceous cyst.

In your situation, since the boil has already drained and the redness and swelling have subsided, the hard lump you are feeling could be a result of scar tissue formation or residual inflammation. It is important to monitor the lump for any changes in size, shape, or associated symptoms such as increased pain, redness, or drainage, which could indicate a recurrence of infection.

Regarding the necessity of surgery, it is not always required. If the lump is stable, not causing significant discomfort, and there are no signs of infection, it may be reasonable to observe it for a period. Many times, these lumps can resolve on their own as the body continues to heal. However, if the lump persists for an extended period (typically several weeks to months) without improvement, or if it begins to cause pain or discomfort, further evaluation may be warranted.

In terms of treatment, continuing antibiotics may not be necessary unless there is evidence of an ongoing infection. Antibiotics are typically used to treat active infections, and once the acute phase has resolved, their role diminishes. If the lump is indeed scar tissue or a benign cyst, antibiotics would not be effective.

If surgical intervention is suggested by a physician, it is usually because they suspect that the lump may be a residual abscess or another condition that requires removal for definitive treatment. Surgery can help alleviate discomfort and prevent potential complications, especially if the lump is causing pain or is suspected to be infected.

In summary, the decision to proceed with surgery should be based on a thorough evaluation by a healthcare professional. They may recommend imaging studies, such as an ultrasound, to assess the nature of the lump before making a definitive recommendation. If the lump is stable and asymptomatic, a watchful waiting approach may be appropriate. However, if you notice any concerning changes or if the lump continues to cause discomfort, it is advisable to follow up with your healthcare provider for further assessment and management options.

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