Prickly Heat (Acne Miliaris, Sweat Rash, Spurs Or Heat Rash)

Prickly Heat

What Is Prickly Heat

What disease is prickly heat?

Miliaria, also known as miliaria, also known as sweat rash, spurs or heat rash, is a common transient skin disease in summer.

Due to the high temperature and sweltering heat, excessive sweating and unsmooth sweat discharge, the sweat gland ducts are blocked by keratin, and sweat overflows, infiltrates and stimulates the surrounding tissues, resulting in papules, herpes zoster and vesicles at the sweat pores.

Both adults and children can give birth, but children are more common, especially infants. Generally, as long as the environment is kept cool and the skin is clean and dry, the prickly heat will heal by itself.

For pruritus or heavier symptoms, cold or cold water can be applied externally, and calamine lotion can be applied externally to relieve the symptoms. • Seek medical attention in case of infection.


What Is The Cause Of Prickly Heat

What reason is prickly heat caused?

  • The main reason is due to the high temperature and heat, sweating, sweat and not timely out of the body, stranded in the sweat gland duct, make the skin keratinocytes water too much and lead to the swelling and plug the sweat gland duct. Common causes include: hot and humid environment, intense activity, fever, and stuffy skin cover.

  • It is also possible that skin cells and other debris are obstructing the sweat gland ducts. In this way, sweat cannot be excreted but can only penetrate into the surrounding tissues and enter the epidermis and dermis, forming raised small blisters.

Who are the most common people with miliaria?

Prickly heat can occur in both adults and children, but is more common in children, especially infants.

It may be due to the hypoplasia of eccrine ducts or the failure to ensure timely patency of the eccrine ducts after the baby is born.

Can prickly heat be infected?


Can prickly heat be inherited?



What Symptom Does Prickly Heat Have

What are the common manifestations of miliaria?

There are three main types of miliaria, including crystalline, red, and deep.

Crystalline miliaria:

  • It is caused by superficial obstruction of the sweat gland duct and is characterized by superficial and transparent 1–2 mm blisters that resemble water droplets and are easily chafed and broken. The blisters can be fused without erythema around them, thus not causing obvious inflammatory reactions.
  • Blisters tend to be generalized and most commonly occur in the head, neck and upper trunk of a newborn and in the trunk of an adult. The affected area is usually asymptomatic.
  • In a suitable precipitating environment, blisters can appear in batches within days to weeks and resolve within hours to days with fine scales after drying.

Red miliaria:

  • It is the most common type and usually occurs within the epidermis, with sweat leakage causing inflammation of the tissues around the sweat ducts. It is characterized by 2 to 2~4 mm red papules (non-follicular) that may be dome herpes or pustules, often with erythema at the base.

    Bacteria may be present when pustules occur.

  • In infants, it is most common at the folds of the skin in the neck, axilla or groin; In adults, it is common in areas of clothing friction: the upper part of the trunk (especially the back), scalp, neck, and wrinkled areas of the skin. Face and palms and soles generally do not occur.

  • Red miliaria are usually accompanied by pruritus or tingling pain and are aggravated by sweating. Red miliaria can be infectious and cause impetigo or multiple abscesses.

Deep miliary eruption:

  • It usually occurs after repeated episodes of red miliaria and is caused by obstruction deeper within the sweat gland ducts (at the dermis-epidermis junction). The exudation of sweat to the surrounding tissue resulted in hard, red-to-skin papules 1 to 1~4 mm in diameter.

  • Deep miliaria are rare and most common in adult males, especially military personnel stationed in tropical climates. It tends to occur in the trunk but can also occur in the extremities. Since sweat is blocked in the deep part of the skin, there is little perspiration in the affected area, also known as tropical anhidrosis.

  • Rash is generally asymptomatic or mild and symptoms may become apparent when sweating.


How To Check Whether Suffer From Prickly Heat

How is prickly heat diagnosed?

When doctors diagnose miliaria, they mainly look at whether it is a hot season or whether there is a recent history of sweating, and refer to the clinical symptoms of patients.

  • In the case of crystalline miliaria, physical examination should reveal multiple superficial, clear blisters without inflammation.

  • If it is a red miliary rash, there are red papules, herpes zoster or pustules that are not follicular.

  • In the case of deep miliaria, it is a firm red-to-skin papule that should also be non-follicular.

In the case of severe or recurrent disease, biopsy may be required to confirm the diagnosis.

What diseases are prickly heat easily confused with? How?

  • Miliaria can be distinguished from folliculitis. The main distinguishing feature is the fact that miliaria have non-follicular features, whereas folliculitis does not.

  • Prickly heat can be distinguished from eczema. Prickly heat is small blisters; And eczema is patches of red rash, hair parts are not the same, prickly heat long in easy to sweat, such as the neck, axillary, groin, back, and eczema long in dry friction, such as cheek, elbow, knee.

  • Difference between neonate and acne. Prickly heat is characterized by needlepoint-sized papules, papules, or pustules on a red substrate that improve when cool.

    Acne is acne, papules, pustules, that is, similar to the appearance of "acne", a small bag, the above hoary head, can be accompanied by inflammatory erythema and edema, slightly larger than miliaria, can be between 1 ~ 5 mm, has little to do with temperature changes. In particular, neonatal, infant miliaria easily confused with neonatal, infant acne.

The specific type of skin disease needs to be definitely diagnosed by a specialist, and medicines cannot be used by oneself so as not to delay the disease.


How To Prevent Miliaria

Can prickly heat be prevented? How?

Prickly heat is preventable.

For etiology, lower the temperature and keep it dry. The specific measures are as follows:

  • Strengthen indoor ventilation and heat dissipation, reduce sweating and facilitate sweat evaporation;

  • Wear loose cotton clothes;

  • Wipe clean and keep dry in time after sweating.

How does prickly heat prevent relapse?

As with preventive measure.


How Is Prickly Heat Treated

Prickly heat to see which department?


Can prickly heat oneself good?

Prickly heat can generally be relieved or cured after the cause is removed. If severe, adjuvant drug therapy is still needed to relieve the symptoms.

How does prickly heat eliminate?

The main principle is to reduce the temperature as much as possible to reduce sweating and sweat gland duct obstruction. Including in a cool environment, penetrating clothing, cold water bath, etc.

For red or deep granulites, in addition to routine measures, auxiliary drugs such as corticosteroids and antibiotics can sometimes be used locally to reduce inflammation and the number of bacteria in papules or pustules, improve symptoms or accelerate resolution.

What medicaments can be used when prickly heat is treated?

In general, red miliaria can be treated with adjuvant interventions to reduce inflammation and minimize the potential for bacterial promotion.

  • Topical corticosteroids: The itching and sharp pain are unbearable. The weak to medium-effect corticosteroid cream or lotion, such as 0.05% Desonide cream and 0.1% hydrocortisone butyrate cream, can be applied locally, twice a day for 1–2 weeks, to relieve the itching and accelerate the resolution of inflammation.
  • Topical antibiotics: topical antibiotics reduce inflammation and reduce the number of bacteria in papules or pustules. This may be more beneficial for patients with pustular milieu (large superficial pustules with a needle at the top of the prickle). Erythromycin ointment, mupirocin ointment, etc. can be used.
  • Oral antibiotics are currently not recommended.

Does prickly heat need to be hospitalized?

No. Go to a hospital if you have a fever or skin infection.


What Should Prickly Heat Patient Notice In Life

What should notice on long prickly heat diet?

Try to eat less spicy food, will increase sweating.

What should notice in the life with long prickly heat?

  • Try to stay in a cool environment;

  • Wear loose, breathable cotton clothing;

  • After exercise sweating to wipe clean in time to keep dry;

  • Use cooler water temperature for bathing;

  • • A soft, washable towel helps remove debris that may clog sweat gland ducts;

  • Try not to scratch the prickly heat to prevent infection. Can't help it, can be cold (ice) apply the affected part, or in the place where there is no break repeatedly coated calamine lotion;

  • Keep a cheerful mood, should not be agitated.

Can prickly heat powder be used?

Not recommended, prickly heat powder in case of sweat easily cake, but lead to sweat gland duct blockage.

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