Switch to detergents and fabric softeners designed for sensitive skin, or that contain no dyes or perfumes. Typically you can find these wherever you normally shop for laundry supplies at the same price as the detergent and fabric softener you usually buy. Wash your workout clothes in hot water to eliminate any residual irritants left over from previous washings. If you try this and notice no difference in how much your legs itch, that doesn’t necessary mean your old detergent or fabric softener wasn’t to blame. The problem also could be a combination of several different causes.

You also may be wearing too much clothing. If you’re too warm, your skin may respond by itching. When you dress to workout, keep in mind that your body will be several degrees warmer when your heart rate goes up. If you’re running outside and it’s cold, wear light layers that you can easily remove after you’ve warmed up. You also should be on the lookout for tags or seams. Something you don’t even notice normally may be irritating your legs once the skin becomes warm and slightly inflamed from exertion. This is especially important if you’re wearing running tights or more form-fitting long pants. If you’re wearing shorts and your bare skin is itching, you can mark this (as well as a potential reaction to detergent or fabric softener) off your list.

This is true regardless of whether you’re wearing long pants or shorts when you run, although long pants or running tights may make the itching worse. Use a moisturizing, non-greasy lotion after your shower. You may want to reapply it about a half hour before you go for your run, if several hours pass between your shower and your exercise session. Look for an active moisturizer over a more cosmetic, scented body lotion. The latter will often run when you get sweaty, which can make your legs sticky and even itchier than before.

If you’ve never shaved your legs (or if your legs are itching when you’re wearing shorts), this probably isn’t the reason your legs are itching. However, running tights or form-fitting running pants can still rub against your leg hair and cause itching, even if you’ve never shaved before in your life. Make sure you’re adequately moisturizing your legs and using a specially formulated shave gel or lotion when you shave to protect against razor burn. Once you shave, if that solves your problem, you have to keep with it. Even day-old stubble can cause the itching to start again.

While medical and fitness experts aren’t entirely sure why, your legs may itch when your body is unaccustomed to that level of physical activity. This may be because you have poor circulation in your legs. [6] X Trustworthy Source Go Ask Alice Medical advice site with content written by health promotion specialists affiliated with Columbia University Go to source If you are also experiencing pain along with the itching in your legs, then see a doctor as soon as possible. If you have recently started (or restarted) running, keep at it for a few weeks and see if the itching subsides. During that time, you can attempt to eliminate any other potential causes through trial and error. After you’ve been running for about a month, look at the possibility of a medical condition if your legs are still itching when you run.

If your legs don’t itch when you run on a treadmill, the itching may be a result of an allergic reaction to pollen in the air or other environmental triggers. It also could be a result of the air temperature and humidity, or general air quality outside. On the other hand, if your legs continue to itch even when you run on a treadmill in a climate-controlled environment, you have at least eliminated environmental causes as the sole reason for your itching. Keep in mind they still may play a part.

If you swim frequently, then the exposure to chlorine may also be a cause of dry skin. Take a shower after swimming to rinse the chlorine off your body.

You may find relief with an over-the-counter antihistamine drug. The brand doesn’t particularly matter, but you may want to try more than one as you may find one is more effective for you than others. Keep in mind that some antihistamines, such as Benadryl, may cause drowsiness, and this may be unsafe for running since you need to be alert. [9] X Research source Never take more than the recommended dose or more than one antihistamine at a time, as it could cause drowsiness and other side effects. Take your antihistamine about a half hour before you plan to go for your run. If you find that over-the-counter antihistamines reduce, but don’t eliminate, your itching, you may want to talk to your doctor about getting a stronger drug in prescription form.

Being dehydrated may contribute to your body’s production of histamine, which could be the cause of your itching – especially if you don’t have this problem during the warmer months or when you’re running indoors on a treadmill. In cold weather, you may not feel much like drinking water. You don’t necessarily want ice water (which will have a cooling effect on your body), but you do want to drink a glass of water 30 to 45 minutes before you go out running, and another when you’re done with your run. If feasible, you also want to have a water bottle with you so you can drink water during your run – especially if you’re running on a treadmill or going a long distance.

If you have a history of breaking out in hives in response to stress or anxiety, you may be more likely to have this condition. Talk to your physician or to an allergy specialist if you believe you have exercise-induced urticaria. As this is a relatively uncommon condition, you may have to talk to several professionals before you get the help you need.

Gather information before your appointment, so you’re prepared to answer your doctor’s questions. You may want to measure your heart rate after 10 minutes or so of running, and take note of normal conditions when you go on a run. Be sure to tell your doctor of any acute causes, such as dry skin or a reaction to your detergent or fabric softener, that you believe you’ve eliminated. Keep in mind that finding relief for your symptoms still may involve a bit of trial and error as your doctor finds the right prescription or other treatment that will work for you.

Symptoms to watch for include lightheadedness, sudden loss of muscle control, a tightness or constricted feeling in your throat, and difficulty swallowing or breathing. Your symptoms may be relatively mild, to the point you can comfortably ignore them and continue your exercise. If they increase in severity, however, you should stop running. With mild symptoms, it’s possible they will improve if you slow down and take a break, and you may be able to resume your run without any problems.

Breathe in slowly through your nose, exhaling through your mouth. When your breathing feels regular, try to drink some water. Keep in mind symptoms may continue for hours after they began. If your symptoms seem to get worse even after you’ve stopped exercise, seek emergency medical attention immediately. Don’t continue to run if you manage to stabilize and your symptoms seem to go away. You might try walking, but if you start running again so soon after an episode, the symptoms could quickly return with increased severity.

Document where you run, the time of day, the weather (if you’re running outside), and how long you had been running when you noticed the first symptom. Take your pulse, if possible, or at least make an attempt to estimate your heart rate or the intensity of your exercise. Take an inventory of household products and toiletries you commonly use, as well as everything you consumed before your run. Even if you’ve already eliminated possible allergies to these things, your doctor still may want this information. If you’ve recently changed soaps, detergents, or other products in an attempt to stop the itching, write this down as well, along with whether you noticed any relief after the change. Include details about what you were wearing on your run, and whether your skin felt unusually warm before the symptoms started.

Symptoms can vary greatly, which not only means that many people remain unaware of their condition, but also that doctors lack the information to diagnose them properly. Generalized itching, particularly when accompanied by welts or hives, can be more common. A tightness in your throat and difficulty breathing or swallowing is a common symptom of anaphylaxis, but it may not be a symptom you have. Other symptoms include nausea, low blood pressure, sudden loss of muscle strength or motor control, fainting, lightheadedness, and headaches.

Your allergy may be so mild that you don’t even realize you have it until you start exercising shortly after exposure to the antigen. Your increased temperature and heart rate as a result of exercise causes you to have an exaggerated reaction. However, you won’t know if this is the cause unless you get tested for these common allergies. If allergy tests reveal the cause, you have a simple way to stop your legs from itching when you run – avoid exposure to whatever triggers an allergic reaction. Prescription antihistamines also may help you, but you’ll need to talk to your doctor about which drugs are safe for chronic use.

Your doctor will teach you about preventative measures you can take to avoid another episode, and may instruct you to wear a med-alert bracelet. You also may need to carry an epinephrine auto-injector with you when you run in case you need to thwart an episode. If you are diagnosed with exercise-induced anaphylaxis, you should avoid exercising alone, even if your symptoms are controlled or you go for a long period of time without experiencing any symptoms. Keep in mind this doesn’t mean you can never run again. Part of the nature of exercise-induced anaphylaxis (if that is your ultimate diagnosis) is that it comes and goes. You may have no symptoms for months or even years, and then suddenly have another episode.