Symptoms A-Z

Rash on One Lower Leg Symptoms, Causes & Common Questions

Understand your rash on one lower leg symptoms, including 10 causes and common questions.

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Contents

  1. 10 Possible Rash On One Lower Leg Causes
  2. Questions Your Doctor May Ask
  3. Statistics

10 Possible Rash On One Lower Leg Causes

The list below shows results from the use of our quiz by Buoy users who experienced rash on one lower leg. This list does not constitute medical advice and may not accurately represent what you have.

Non-specific dermatitis (skin inflammation)

Nonspecific dermatitis, or contact dermatitis, simply means inflammation of the skin from many different causes.

Most nonspecific dermatitis is caused by skin contact with a substance that provokes a reaction, which could be anything from plants to soap to jewelry to fabrics. Some may be due to an autoimmune condition, where the body's immune system attacks itself.

Risk factors include a family or personal history of allergies, asthma, or other condition which weakens the immune system; or constant contact with metals, plant life, or chemicals.

Symptoms commonly include red, swollen skin rash with itching, blistering, or oozing, which may become painful and infected.

Dermatitis itself is not contagious but can interfere with quality of life. A medical provider can help with managing the symptoms.

Diagnosis is made through patient history, physical examination, and sometimes skin biopsy and patch testing.

Treatment involves using protective measures if the substances cannot be avoided; making nutritional improvements to strengthen the immune system; using corticosteroid or other creams; and phototherapy.

Rarity: Common

Top Symptoms: red rash, itchy rash, painful rash

Symptoms that always occur with non-specific dermatitis (skin inflammation): red rash

Urgency: Self-treatment

Eczema (atopic dermatitis)

Eczema (atopic dermatitis) is a non-contagious chronic skin condition that produces an itchy rash. It is caused by a genetic condition that affects the skin's ability to protect itself from bacteria and allergens. The most susceptible are those with a family history of atopic dermatitis, asthma, or hay fever.

Infants will have a dry, scaly, itchy rash on the scalp, forehead, and cheeks. Older children will have the rash in the creases of elbows, knees, and buttocks.

Without treatment, a child may have trouble sleeping due to the intense itching. Constant scratching may cause skin infections.

Eczema cannot be cured, but it can be controlled through prescribed medications, skin care, stress management, and treatment of food allergies. People with eczema often have allergies to milk, nuts, and shellfish. Keeping the skin clean and moisturized helps prevent flares.

Rarity: Common

Top Symptoms: trouble sleeping, feeling itchy or tingling all over, dry skin, scalp itchiness, flexor surface rash

Symptoms that never occur with eczema (atopic dermatitis): fever

Urgency: Phone call or in-person visit

Non-specific skin rash

Common causes of rash are contact dermatitis, sun damage, or allergic reaction. However, many rashes are a symptom of disease and should not be ignored.

Nonspecific rashes have widely varied symptoms:

  • May be flat and smooth; slightly raised or with swollen welts; clean and dry; or blistered and oozing.

May spread widely over the body, or be confined to one site.

  • May appear after eating certain foods; or after exposure to certain plants or to insect stings or bites.

Other symptoms may be present, including pain anywhere in the body; nausea; vomiting; fever; headache; or abdominal pain and upset.

Diagnosis is made through patient history and physical examination to determine the exact type, location, and history of the rash, along with any other symptoms that may be present.

Those symptoms will be investigated with blood tests or imaging. Skin swabs may be taken and tested. After the process has ruled out as many causes as possible, a course of treatment can be determined.

Rarity: Common

Top Symptoms: rash

Symptoms that always occur with non-specific skin rash: rash

Urgency: Wait and watch

Seborrheic dermatitis

Seborrheic dermatitis is a common chronic inflammatory skin condition that causes flaky, white to yellowish scales to form on oily areas such as the scalp, face or inside the ear. It can occur with or without reddened skin. The exact cause of this condition is not known, although doctors think that some common skin yeast organisms, called Malassezia, may play a role in some people.

Rarity: Common

Top Symptoms: itchy rash, red or pink, rough patch of skin, rash with well-defined border, scalp skin changes, cheek skin changes

Symptoms that never occur with seborrheic dermatitis: fever

Urgency: Phone call or in-person visit

Pityriasis rosea

Pityriasis rosea is a common skin rash and is thought to be due to a type of herpes virus. It is not contagious and is not sexually transmitted. Most susceptible are teenagers and young adults.

Symptoms include a single large scaly patch somewhere on the body. In the next 7 to 14 days similar oval pink patches on the arms, legs, and trunk appear, sometimes in a pattern of lines.

There may also be itching, fatigue, and body aches along with the rash. Anything that raises body temperature, such as exercising or a hot bath, may worsen the rash.

The condition may last for a few weeks and is normally gone after three to four months. Sometimes flat brown spots are left as the rash fades.

Pityriasis rosea can resemble other conditions, so getting an accurate diagnosis is important. Diagnosis is made through blood tests and skin cultures.

Treatment involves topical medications for itching, as well as antiviral and anti-inflammatory medications by mouth to aid healing. Cool baths and reduced exercise will also help.

Rarity: Rare

Top Symptoms: rash, itchy rash, curved rash, rough patch with red spots around it

Symptoms that always occur with pityriasis rosea: rash

Symptoms that never occur with pityriasis rosea: blue-colored skin changes, black-colored skin changes, brown-colored skin changes

Urgency: Self-treatment

Rash On One Lower Leg Symptom Checker

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Lower leg weakness

Any leg weakness is a sign of nerve damage, which is very worrisome and requires you to go see a doctor immediately!

Rarity: Uncommon

Top Symptoms: lower leg weakness, foot weakness, arm weakness, loss of vision, severe pelvis pain

Urgency: Hospital emergency room

Chronic hepatitis c

Chronic hepatitis C is a liver inflammation caused by Hepacivirus C.

If someone is infected with hepatitis C and gets the acute form of the disease, there is about a 50% chance of the disease becoming chronic. This means that the virus remains in the body after the acute, short-term disease is over, and may or may not cause further illness.

Some patients have no symptoms of chronic hepatitis C until years later, when liver damage has developed and the signs of cirrhosis (scarring) begin to appear. Hepatitis C can also lead to liver cancer.

Diagnosis is made through blood tests.

Treatment for chronic hepatitis C involves taking medications prescribed by the physician; avoiding alcohol; and using no supplements or prescription medications without a doctor's clearance. In some cases, a liver transplant will be needed to save the patient's life.

The best prevention is to never share needles, toothbrushes, or other personal care items, and to always practice safe sex. There is no vaccine for hepatitis C.

Rarity: Common

Top Symptoms: fatigue, nausea, muscle aches, loss of appetite, joint pain

Symptoms that never occur with chronic hepatitis c: pain in the lower right abdomen, pain in the lower left abdomen, pain in the upper left abdomen, pain around the belly button

Urgency: Primary care doctor

Irritant contact dermatitis

Irritant contact dermatitis means a skin reaction that is caused by directly touching an irritating substance, and not by an infectious agent such as a bacteria or virus.

Common causes are soap, bleach, cleaning agents, chemicals, and even water. Almost any substance can cause it with prolonged exposure. Contact dermatitis is not contagious.

Anyone who works with an irritating substance can contract the condition. Mechanics, beauticians, housekeepers, restaurant workers, and health care providers are all susceptible.

Symptoms include skin that feels swollen, stiff, and dry, and becomes cracked and blistered with painful open sores.

A medical provider can give the best advice on how to heal the skin and avoid further irritation. Self-treatment can make the problem worse if the wrong creams or ointments are used.

Diagnosis is made through patient history, to find out what substances the patient comes into contact with, and through physical examination of the damaged skin.

Treatment involves avoiding the irritating substance if possible. Otherwise, the person can use petroleum jelly on the hands underneath cotton and then rubber gloves.

Rarity: Common

Top Symptoms: rash with well-defined border, itchy rash, red or pink, rough patch of skin, painful rash, red rash

Symptoms that always occur with irritant contact dermatitis: rash with well-defined border

Symptoms that never occur with irritant contact dermatitis: fever, black-colored skin changes, brown-colored skin changes, blue-colored skin changes

Urgency: Self-treatment

Hives

Hives, or urticaria, are flat red welts that can appear anywhere on the skin and usually itch. Hives often occur as an allergic reaction to something eaten or something that has contacted the skin. Foods, medicines, and plants are common causes, but sun exposure, stress, infections, and autoimmune diseases have also been known to cause hives.

Symptoms include an itchy, stinging pink rash of slightly swollen skin. The rash may wax and wane in severity. Acute hives typically resolve within six weeks, but chronic hives can persist for months or years.

Hives often resolve on their own, especially in children. Otherwise, treatment for acute hives involves oral antihistamine medications to help relieve the itching and stinging. Chronic hives that do not improve with antihistamines may be treated additionally with corticosteroids, antibiotics, and other stronger medicines.

Rarity: Common

Top Symptoms: red or pink, rough patch of skin, itchy rash, curved rash, insect bite or sting, hives, red swollen bumps or patches with a pale center

Symptoms that always occur with hives: red or pink, rough patch of skin

Urgency: Self-treatment

Allergic contact dermatitis of the lower leg

Allergic contact dermatitis is a condition in which the skin becomes irritated and inflamed following physical contact with an allergen. Common products known to cause allergic dermatitis include plants, metals, soap, fragrance, and cosmetics.

Rarity: Common

Top Symptoms: lower leg redness, lower leg itch, scabbed area of the lower leg

Symptoms that always occur with allergic contact dermatitis of the lower leg: lower leg redness

Urgency: Self-treatment

Questions Your Doctor May Ask About Rash On One Lower Leg

To diagnose this condition, your doctor would likely ask the following questions:

  • Any fever today or during the last week?
  • What color is the skin change?
  • Are there bumps on your rash?
  • Does the rash have a clearly defined border?

The above questions are also covered by our A.I. Health Assistant.

If you've answered yes to one or more of these questions

Take a quiz to find out why you're having rash on one lower leg

Rash On One Lower Leg Symptom Checker Statistics

People who have experienced rash on one lower leg have also experienced:

  • 11% Leg Skin Changes
  • 8% Itchy Rash
  • 4% Shin Itch

People who have experienced rash on one lower leg were most often matched with:

  • 66% Eczema (Atopic Dermatitis)
  • 33% Non-Specific Dermatitis (Skin Inflammation)

People who have experienced rash on one lower leg had symptoms persist for:

  • 29% Over a month
  • 27% Less than a week
  • 25% Less than a day

Source: Aggregated and anonymized results from visits to the Buoy AI health assistant (check it out by clicking on “Take Quiz”).

Rash On One Lower Leg Symptom Checker

Take a quiz to find out why you're having rash on one lower leg