Tennis Toe

Written By: Chloe Wilson BSc(Hons) Physiotherapy
Reviewed By: FPE Medical Review Board

Tennis Toe occurs when damage to the toe causes bleeding resulting in blood collecting underneath a toe nail. 

Tennis Toe most commonly affects athletes due to repetitive trauma to the toe and can be extremely painful.

Repeatedly injuring the toe leads to pooling of blood underneath the nail plate causing the nail to appear black or red.  It is the big toe that is most commonly affected.

In most cases tennis toe can be treated at home and will settle down within a few weeks. More severe cases will need a medical review. It is also known as a "Subungual Hematoma" or "Runners Toe".

Here, we will look at the common causes, symptoms and treatment options, as well as how to prevent this painful condition from developing or recurring in the future.

Tennis Toe Symptoms

Tennis Toe usually presents with throbbing pain under the nail and associated bleeding. The active bleeding tends to subside when you stop activity but will leave the nail looking bruised.

The nail plate is usually discoloured a reddish-blue/black colour due to the subungual hematoma and may become thickened and more brittle.

It tends to occur at the big toe, but can also affect the second toe.  It is rare for it to present in the outer three toes. 

How Do You Treat Tennis Toe?

For mild cases of tennis toe, treatment is very simple. Cleaning the toe with antiseptic and covering it with a dressing will prevent further infection and allow healing. 

The affected nail plate will gradually grow out and be replaced by a new healthy one, but this does take a few months.

With more severe cases when there is a lot of bleeding, swelling and/or infection, you should see your doctor or podiatrist.  They may need to make a small hole in the nail to take the pressure off the subungual hematoma (collection of blood) which should drastically reduce the pain. 

Occasionally, in severe cases your doctor may decide that part or all of the nail needs to be removed.

How To Prevent Tennis Toe

There are some simple measures you can do to reduce the risk of developing tennis toe:

• Clip Your Toe Nails: Keep toe nails clipped short so they don’t extend past the end of the toe.  That will reduce the pressure and friction, preventing a subungual hematoma from developing
  
  
• Good Footwear:  Make sure you are wearing shoes that fit well.  Some people swear by steel toe tennis shoes to prevent friction and squashing of the toes.  They can take a few days to get used to as they are heavier than regular shoes, but they really can make a difference, especially if you are playing a lot of sport
  
  
• Taping: Tape the toe to the one next to it
  
  
• Play on the Right Surface: Tennis Toe is thought to be less common when playing on natural surfaces such as a grass or clay court rather than on synthetic surfaces

Tennis Toe Summary

Tennis toe is a painful condition caused by repeated trauma to the toe, resulting in bleeding under the toenail, known as a subungual hematoma.

It most commonly affects the big toe in athletes who stop, start, or change direction quickly, such as tennis players and runners. Tennis toe typically causes throbbing pain, pressure under the nail, and red, blue, or black nail discoloration.

Most cases of tennis toe settle with simple home treatment and improve as the nail grows out, but severe pain, swelling, or signs of infection may require medical treatment. Wearing well-fitting footwear, trimming toenails short, and reducing toe friction are the most effective ways to prevent tennis toe.

You may also be interested in the following articles:

• Toe Joint Pain
• Lump On Toe
• Toe Deformities
• Turf Toe

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Page Last Updated: 19th February, 2026
Next Review Due: 19th February, 2028

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