You've worked hard and lost weight, but now your skin really itches, and it's quite annoying. Might there be a connection between weight loss and itchy skin? Weight loss may not cause itchy skin directly, but certain aspects of weight loss, including dietary changes and exercise, may play a role.

Why Your Skin Might Itch After Losing Weight

There are a number of possible explanations for your itchy skin.

You May Have a Nutritional Deficiency

If you're eating to lose weight, odds are you're eating less than you used to. In doing so, you may be inadvertently skipping over some important nutrients that your skin needs to stay healthy, says Tanya Nino, MD, a dermatologist with St. Joseph Hospital in Orange County, California. You're more prone to dry skin if your diet is low in the following nutrients:

• Iron

• Niacin

• Vitamin A

• Vitamin D

• Zinc

You can also develop dry skin from not eating enough in general. If your diet is too low in calories, you're likely not getting enough of the nutrients your skin needs to stay healthy.

You May Be Chafing While Exercising

Did you exercise a lot to lose weight? Some exercises, such as bicycling or running, can cause your skin to rub against itself or clothing or other objects. "Depending on how much and what exercise you are doing to lose weight, itching also can be related to frictional irritation," Dr. Nino says. This is known as chafing.Chafing can happen anywhere you have skin folds, anywhere parts of your body rub together, or anywhere your skin rubs against clothing or another material. Common places you may experience chafing include the breasts, nipples, thighs, armpits, groin, buttocks, and feet. Signs and symptoms of chafing range from mild to severe and may include:

• Flaky, dry skin

• Red rash

• Raised bumps

• Warmth on or around the affected body part

• Burning or stinging

• Irritated or tender skin

• Welts, blisters, sores, or swelling on or around the affected body part

• Cracked, broken, or bleeding skin

• Skin infections such as intertrigo, a type of dermatitis that can form when skin rubs against itself in warm, moist areas. Intertrigo can lead to an oozing rash or bacterial or yeast infections.

If you're starting a new exercise routine at a higher weight, that could also increase your risk of chafing. People with more body fat have more skin folds, which makes them more prone to chafing.

You Could Have a Skin Infection From Excessive Sweating

If you sweat a lot when you exercise, you're more prone to fungal or bacterial infections that can cause your skin to itch, Nino says. As mentioned, a skin infection called intertrigo can form when skin rubs against itself in warm, moist areas, including those most prone to sweating. These may include the armpits, creases of the neck, between or beneath the breasts, between folds of the belly, or between your inner thighs, among others.Another skin infection, called tinea versicolor, is a fungal infection that can form in sweaty areas of the body like the chest and back. Symptoms may include patches of skin discoloration, itching at the site of skin discoloration, excessive sweating, and patches of skin that become dry and form scales.

If you think you have symptoms of a skin infection, see a doctor who can diagnose the infection and prescribe medication to heal your skin.

How to Stop the Itch

If you're dealing with itchy skin, the good news is that there are ways you can relieve and prevent it. These include:

• ​Eat a nutritious diet. Ensure your diet includes all of the nutrients your body needs to avoid deficiencies, which may be associated with dry, itchy skin. If you're not sure how to do this, your doctor or a registered dietitian-nutritionist can help you create a meal plan that helps you lose weight while meeting your body's nutrient needs.

• Take steps to prevent chafing. Wear loose-fitting clothing made of sweat-wicking materials, such as 100 percent cotton. Try using anti-chafing products, such as creams, sticks, or petroleum jelly, in areas where your skin is prone to chafing. If you feel like you're chafing as you're exercising, stop the activity to avoid making it worse.

• Wear clean, dry clothes and remove sweaty clothes quickly. Dried sweat, dirt, and other debris can irritate your skin, which is why it's important to change out of sweaty clothes promptly. Don't rewear sweaty clothes, either, which can reintroduce dirt and grime to your skin.

• Shower daily, especially after exercising or sweating. This is especially important for parts of your body where the skin rubs together.

• Get in and out of water.​ Keep your baths and showers brief and use water that's warm, not hot. Use mild cleansers and dry off with gentle pats.

• ​Moisturize.​ Apply moisturizer to your skin soon after your bath or shower to trap in the moisture. Ointments and creams are more effective than lotions. Use hand cream after washing your hands, too, if the skin gets dry and itchy.

If your symptoms persist and these changes don't help, see your doctor or a dermatologist. You may need additional treatment for your symptoms.

The Takeaway

• There's likely no direct link between itchy skin and weight loss. However, if you're experiencing itchy skin while losing weight, it could be due to several factors sometimes associated with weight loss, such as nutritional deficiencies, increased chafing during exercise, or skin infections from excessive chafing or sweating.

• Ensure you're consuming a balanced diet rich in essential nutrients like iron, niacin, vitamins A and D, and zinc to help prevent dryness, itch, and skin irritation.

• To minimize chafing, wear loose, moisture-wicking clothing and apply anti-chafing products to vulnerable areas, especially during exercise.

• If your itching persists or you notice possible signs of a skin infection, see your doctor or a dermatologist for a diagnosis and treatment.