Lidocaine patches are topical medications designed to relieve localized pain. These adhesive patches contain lidocaine, a local anesthetic, and are applied directly to the skin over a painful area. They offer targeted, temporary relief for minor aches and specific types of nerve pain. Patches are available in various strengths, with over-the-counter (OTC) versions typically containing 4% lidocaine and prescription-strength patches containing 5%.
Applying Lidocaine Patches to Feet
Lidocaine patches can be used on the feet to address various forms of localized pain. They are suited for conditions such as plantar fasciitis, heel and arch pain, discomfort in the ball of the foot, general arthritis pain, or localized musculoskeletal discomfort.
Lidocaine works as a local anesthetic by stabilizing the neuronal membrane within nerve cells. It inhibits the flow of sodium ions, which are crucial for nerve impulse transmission. By blocking these sodium channels, lidocaine prevents pain signals from being generated and sent to the brain, numbing the specific area.
For application on the feet, patches can be placed on areas like the top of the foot, the arch, or the heel, directly over the site of pain. Apply the patch to clean, dry, and intact skin. Avoid areas with broken skin, cuts, or irritation to ensure effectiveness and safety.
Safe and Effective Usage
Proper application of lidocaine patches maximizes effectiveness and minimizes potential side effects. Before applying a patch, thoroughly clean and dry the skin area. Choose a spot with little or no hair, avoiding irritated, cut, or scarred skin. After handling the patch, wash your hands with soap and water to prevent unintended medication exposure.
Many lidocaine patches, especially prescription versions, can be cut into smaller sizes to fit specific areas after removing the release liner. This allows for precise application to the painful area. Over-the-counter 4% lidocaine patches are applied up to three or four times daily, with each application lasting no more than eight to twelve hours. Prescription 5% patches are generally applied once a day for up to twelve hours. It is recommended to use only one OTC patch at a time, while a maximum of three prescription patches may be used simultaneously as directed by a healthcare professional.
While generally well-tolerated, some individuals may experience mild side effects at the application site. These can include temporary skin irritation, redness, or a mild burning sensation. Should any irritation or burning occur, remove the patch and delay reapplication until the skin irritation subsides. Avoid heat sources, such as heating pads, over the patch, as heat can increase lidocaine absorption and potentially lead to more serious side effects. The treated area should not be bandaged tightly, and the patch should not be worn while bathing, showering, or swimming.
When to Consult a Healthcare Professional
While lidocaine patches offer convenient localized pain relief, consulting a healthcare professional is necessary in specific situations. If pain persists, worsens, or changes in character despite using the patches as directed, medical evaluation is advisable. This continued pain could indicate an underlying condition requiring professional diagnosis and treatment.
Seek immediate medical attention if severe side effects or signs of an allergic reaction occur. Symptoms warranting urgent care include:
- Hives, rash, itching, or blisters
- Difficulty breathing or swallowing
- Swelling of the face, throat, tongue, lips, eyes, hands, feet, or ankles
- Hoarseness, a rapid pulse, or unusual thirst
Though rare, a serious blood condition called methemoglobinemia can occur, presenting with pale or gray skin, shortness of breath, a fast heartbeat, or dizziness. Using lidocaine patches for severe, undiagnosed pain is not recommended, as it may mask symptoms of a condition that requires specific medical intervention.