When Should I Be Worried About Sock Marks? Doctors Reveal What to Watch for and When to Call a Doc
Doctors share how to tell when sock indents are harmless—and when they signal a medical issue
Most of us have worn socks that were too tight or kept them on for too long, leading to subtle indentations around our legs or ankles. This is common and not a cause for concern. That said, there are instances where these imprints may signal an underlying health condition. Here, doctors answer the question, “When should I be worried about sock marks?,” to help you identify potential causes that may warrant treatment.
What health conditions cause sock marks?
The following medical conditions may cause socks to leave marks around your lower legs and require medical attention, so it’s important to be aware of other symptoms that may also be present. Here’s what to be on the lookout for:
Swelling from peripheral edema
This is the most common medical reason you may notice sock marks, says Katherine Teter, MD, Vascular Surgeon with Hackensack University Medical Center. Edema is a type of swelling that occurs when excessive fluid builds up in the tissues of the lower legs and feet, she explains.
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Additional symptoms of edema include swelling in the feet and ankles, skin that appears stretched or shiny, pitting (when indentation marks remain after pressing on the skin), aching or stiffness and difficulty walking, notes Dr. Teter.
Edema can be linked to factors such as prolonged sitting, or, in severe cases, kidney disease or heart problems, adds Raj Dasgupta, MD, Chief Medical Advisor for Garage Gym Reviews.
Circulation issues from venous insufficiency
This circulation issue occurs when the veins in the legs have trouble sending blood flow back to the heart, explains Dr. Teter. The blood pools in the lower legs, increasing pressure and causing fluid to leak into the tissues.
If you have persistent sock marks as well as varicose veins, leg pain (especially after standing for long periods), leg cramps, itching or brownish or reddish skin discoloration, venous insufficiency may be a contributor.
You might also notice a feeling of heaviness in your legs, adds Dr. Dasgupta. If left untreated, venous insufficiency can also cause leg ulcers, he says.
“This should be addressed and evaluated over time with a medical professional, as venous insufficiency can lead to pooling of blood,” cautions Jossef Amirian, MD, Cardiologist with Manhattan Cardiology in NYC. “This increases the chances of blood clot formation, which can be life threatening,”
Chronic swelling from lymphedema
This chronic swelling issue is caused by a malfunction in the lymphatic system, which is part of the immune system. Lymphedema may be a side effect of cancer treatment, caused by infection or injury or arise without any obvious cause, explains Dr. Teter. Being overweight is a known lymphedema risk factor.
Lymphedema typically causes swelling in the affected limb (usually an arm or leg), feeling of heaviness or tightness, restricted range of motion, recurring skin infections and hardening and thickening of the skin, she notes.
Deep vein thrombosis (DVT) blood clotting
“While DVT itself doesn’t cause sock marks, the swelling associated with it can,” says Dr. Teter. “DVT is a blood clot in a deep vein, usually in the leg. This is a serious condition that requires immediate medical attention.”
DVT usually presents with significant symptoms in addition to swelling, she notes. This includes pain in the affected leg (often described as a cramp or charley horse), swelling in the affected leg, warmth and redness in the affected area and tenderness along the vein.
Ankle puffiness from certain medications
Particular medications may cause swelling as well, especially around the ankles, says Dr. Amirian. One example: amlodipine, which is a common medication used to treat high blood pressure.
Kidney or liver disease
In more serious instances, a compromised kidney or liver may be the underlying cause of your sock marks. Kidney problems can cause fluid retention, leading to swelling in the legs and ankles exacerbated by sock marks, says Dr. Teter.
Other kidney disease symptoms often include changes in urination (foamy, dark or decreased output), says Dr. Dasgupta. It can also cause fatigue, loss of appetite, nausea and vomiting, muscle cramps, itching and swelling in the face and hands, adds Dr. Teter.
Advanced liver disease can lead to fluid buildup in the abdomen and legs as well, she says. In this case, you’d likely notice jaundice (yellowing of the skin and eyes), abdominal pain and swelling, nausea and vomiting, loss of appetite, fatigue and easy bruising or bleeding.
When should you be concerned about sock indents?
Normal marks that are harmless (such as from wearing tight socks) are usually minor and disappear shortly after removing your socks. It’s also common for these marks to be more prominent after you’ve been standing or sitting for a long time, says Dr. Teter.
However, she advises seeing a doctor if:
- The indentations are deep and last for a long time (more than an hour)
- The skin around the sock marks is discolored (red, brown or blue), swollen, painful or warm to the touch
- You experience other symptoms along with the sock marks, such as shortness of breath, chest pain, leg pain, unexplained weight gain or changes in urination
- One leg is significantly more swollen than the other
- You have a history of heart, kidney or liver disease
- You’ve recently had surgery or been on a long flight (these situations increase the risk of DVT)
“If you experience persistent or deep sock marks accompanied by any of the additional symptoms listed above, it’s crucial to consult a doctor for a proper diagnosis and treatment,” says Dr. Teter.
“In many cases, this will require evaluation by your primary care physician to rule out any medical causes, as well as a consultation with a vascular specialist to evaluate the veins,” she explains.
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