What happens if you don't drain a subungual hematoma?
Rachel Ellis
Published Jan 08, 2026
If left untreated, a simple subungual hematoma typically grows out along with the lengthening nail plate and resolves on its own. Until the nail grows out, however, you can expect weeks to months of blue-black discoloration.
Is it necessary to drain a subungual hematoma?
You may be able to relieve severe, throbbing pain by draining blood from under your nail. This procedure is not necessary and is not recommended if you are not having pain.
When is it too late to drain a subungual hematoma?
The key is to ensure that the hematoma is not older than 48 hours. In most cases, the hematoma can be drained with a large needle without any complications. Follow up of patients is recommended to ensure that there is no infection and the hematoma has resolved.
What happens if you leave blood under your nail?
The trapped blood will eventually be reabsorbed, and the dark mark will disappear. This can take 2–3 months for a fingernail, and up to 9 months for a toenail. If there is severe damage to the nail bed, the nail may be malformed or cracked when it grows back. Or, it may fail to regrow.
How long can you wait to have trephination of subungual hematoma?
More than 1 to 2 days since injury: By this time, blood within a subungual hematoma will likely have clotted and trephination will not be effective.
27 related questions foundIs it normal for a hematoma to harden?
Many injuries can develop a hematoma and give the area a firm, lumpy appearance. If you have an injury, you might have more than a bruise. It's important to see your doctor if your bruise swells or becomes a firm lump, because it might mean something more severe happened under the skin.
Does nail trephination hurt?
Up to this point, the procedure is typically painless. The experience of draining 3 or 4 hematomas in this manner provides a good feel for that point just before the nail bed is reached. Stopping there makes for a completely painless procedure.
How long does a subungual hematoma hurt?
With a subungual hematoma, the pain typically goes away in a few days. The nail itself will take longer to recover. The discolored nail will eventually grow out — or in some cases, it may fall off or need to be removed — and be replaced by a new, healthy one.
How do you treat a hematoma under the nail?
A small subungual hematoma may not need medical treatment. Ice and elevate the area to reduce swelling, and take over-the-counter anti-inflammatories like aspirin, Advil, or Motrin for minor pain. But the pressure generated by pooled blood under the nail can be extremely painful.
Is subungual hematoma painful?
Initially the injury may only hurt. The nail may feel sore or tender to the touch. As the blood pools under the nail the pressure from the blood can cause severe pain. The pressure caused by blood underneath the nail may result in the affected nail lifting off the finger or toe.
What happens if you don't drain a hematoma?
If a clot from a hematoma reenters the bloodstream, it can block an artery, cutting off blood flow to part of the body. Without prompt treatment, this can result in permanent tissue damage.
Can a hematoma get infected?
Since blood is a rich medium full of nutrients, some hematomas may become infected. Individuals with a hematoma should monitor for signs of increased pain, warmth, and redness. This may be difficult to differentiate from the symptoms of inflammation of the hematoma itself.
What if my hematoma doesn't go away?
A hematoma is similar to a bruise or blood clot but, if left untreated, it can damage the tissue and lead to infection. An injury to the nose can rupture blood vessels in and around the septum where there is both bone and cartilage.
How do I release pressure under my nail?
How to Drain Blood From Under a Nail
- Straighten a paper clip, and heat the tip in a flame until it is red-hot.
- Place the tip of the paper clip on the nail and let it melt through. ...
- Do not push or apply pressure on the paper clip. ...
- Go slowly, and reheat the clip as necessary.
Can I drain a hematoma at home?
TAKE-HOME MESSAGE
The authors recommend using a disposable curette or punch biopsy tool at a tangential angle to drain the hematoma. This sharper tool creates a hole without squeezing the nail and causing pain, and the hole is also large enough to prevent clogging.
Should I drill a hole in my fingernail?
You could try to burn or drill through the nail to relieve the pain, but this is a procedure often best left to your physician. If you really want to do it at home, I suggest using a very small-diameter drill bit and rotating it between your thumb and pointer finger.
Do bruised toenails always fall off?
It can happen to toenails or fingernails. The nail may hurt or feel tender when touched. Depending on the amount of blood beneath the nail, the nail may come loose and fall off. But often the nail does stay intact, and the blood fades as the nail grows out.
When should you worry about a hematoma?
Watch closely for changes in your health, and be sure to contact your doctor or nurse call line if: The bruise lasts longer than 4 weeks. The bruise gets bigger or becomes more painful. You do not get better as expected.
How do I know if my hematoma is healing?
During the healing process, a bruise will usually go through the following colors:
- It often starts red because fresh, oxygen-rich blood has newly pooled underneath the skin.
- After around 1–2 days, the blood begins to lose oxygen and change color. ...
- In about 5–10 days, it turns a yellow or green color.
What helps a hematoma heal faster?
Ice (Apply the ice or cold pack for 20 minutes at a time, 4 to 8 times a day.) Compress (Compression can be achieved by using elastic bandages.) Elevate (Elevation of the injured area above the level of the heart is recommended.)
Can a hematoma last for months?
A large hematoma may last weeks to months and as it heals it will change color and slowly shrink in size. Hematoma pain and swelling may be treated with over-the-counter (OTC) pain medications.
What are 3 causes of a hematoma?
Things to know about hematoma
Some causes of hematomas are pelvic bone fractures, fingernail injuries (subungual), bumps, passing blood clots, blood clots in the leg (DVT), blood cancers, and excessive alcohol use.
How long does it take for a hematoma to reabsorb?
Gradually the blood in the hematoma is absorbed back into the body. The swelling and pain of the hematoma will go away. This takes from 1 to 4 weeks, depending on the size of the hematoma. The skin over the hematoma may turn bluish then brown and yellow as the blood is dissolved and absorbed.
Can a hematoma cause sepsis?
Although our patient eventually started recuperating well, it is important to realize that an infected intramuscular hematoma is a potential cause of recurrent sepsis [10].
Can I take ibuprofen with a hematoma?
If you're treating a hematoma at home, do not take aspirin or ibuprofen (Advil, Motrin). These over-the-counter drugs aren't recommended because they can slow blood clotting.