Chronic idiopathic urticaria (hives) treatment

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Treatment of chronic or idiopathic urticaria involves use of antihistamine medications and avoidance of triggers or aggravating factors.

In the treatment of chronic idiopathic urticaria the principle approach is to control mast cells by suppressing IgE stimulation and/or the histamine release. Mast cells release three major types of histamines, H1, H2 and H3. As the skin contains both H1 and H2 histamine receptors, use of H1 and H2 antihistamines is usually considered for chronic idiopathic urticaria treatment.

Oral antihistamines for treatment of chronic idiopathic urticaria

     Oral antihistamines have been the first line treatment for all patients with chronic or idiopathic urticaria. Non-sedating 2nd generation H1 antihistamines are used with good treatment response. When itching is intense, especially in the night, sedative first generation H1 antihistamines are given in the night and non-sedating 2nd generation H1 antihistamines are given during the day for the idiopathic urticaria patient. Increasing the dosage up to four fold is recommended if the response to the initial dosage is found inadequate during chronic idiopathic urticaria treatment.

First generation H1 antihistamines for chronic or idiopathic urticaria
Chlorpheniramine, hydroxyzine, and diphenhydramine are the first generation H1 antihistamines having side effect of sedation. Though these antihistamines have proven record of efficacy in urticaria treatment, with the advent of second generation drugs their sedative effects appear as a big drawback in the treatment of chronic idiopathic urticaria.

Non–sedating 2nd generation H1 antihistamines in urticaria treatment
Loratadine, fexofenadine, cetirizine, levocetirizine, terfenadine, desloratadine and mizolastine are non sedating second generation H1 antihistamines very much in use in the treatment of chronic idiopathic urticaria.

Nonsedating H2 antihistamines for chronic idiopathic urticaria
Cimetidine, ranitidine, famotidine and nizatadine are H2 antihistamines having no sedating side effect. These drugs have been used successfully along with H1 drugs for the treatment of chronic or idiopathic urticaria.

Treatment of antihistamine –resistant chronic idiopathic urticaria

Some forms of chronic idiopathic urticaria do not respond well to antihistamine treatment. In some patients chronic idiopathic urticaria may become antihistamine -resistant. In such instances non antihistamine medications like systemic corticosteroids, leukotriene modifiers or immunosuppressants may be considered during urticaria treatment. However their use has many limitations due to their side effects.

Role for systemic corticosteroids
Systemic glucocorticoids like prednisone have been used for lessening swelling, inflammation and itch in chronic idiopathic urticaria. However they can be used only for a short treatment periods as they have serious side effects like Cushing syndrome, skin damage, increased blood glucose levels, sleep disturbances, weight gain and psychological effects. Corticosteroids can weaken the immune system and worsen the existing infections of patients with idiopathic urticaria.

Leukotriene modifiers for chronic idiopathic urticaria
     Asthma medications like montelukast and zafirlukast are  leukotriene receptor antagonists (LTRA). They have been found to be effective in the treatment of chronic idiopathic urticaria when used along with non–sedating 2nd generation H1 antihistamines like loratadine. Side effects of leukotriene modifiers include gastrointestinal disturbances, headaches, general hypersensitivity, insomnia, sleep disorders, aggression, anxiousness, hallucinations, depression, irritability, and increased bleeding tendency.

Immunosuppressant drugs
Immunosuppressant drugs like cyclosporine and cyclosporin G are useful in the treatment especially of chronic autoimmune urticaria. As immunosuppressants they suppress the activity of the immunological system by obstructing the activity and growth of T cells. Treatment with immunosuppressants may be associated with a number of potentially serious adverse drug reactions (ADRs) like gastrointestinal disturbances, peptic ulcers, pancreatitis, convulsions, kidney and liver dysfunction, increased vulnerability to opportunistic infections and flare-up of current infections. Ciclosporin is listed as IARC Group 1 carcinogens as sufficient evidence of carcinogenicity in humans has been established.

Maintenance treatment
Once the symptoms resolve the treatment must be continued and tapered off after three months. The dosage of the medication is gradually reduced every two weeks. In many cases relapse has occurred when the medication is withdrawn soon after the resolution of symptoms.

Topical agents
Certain topical agents like calamine lotion, menthol with aqueous cream, and crotamiton lotion have been found to soothe the inflammation and itching. Applying cold compress or ice to the affected area for about 15 minutes relieves swelling, itching and pain. This may be followed up with application of calamine lotion.

Considerations for children
There are specific approvals and restrictions by FDA for use of various antihistamine medications in children considering their age. Please check the drug information provided by the manufacturer for use in children before usage.

Considerations for pregnant women
First-generation antihistamine such as chlorpheniramine is the safest choice for treatment of chronic idiopathic urticaria in pregnant women. Considerable usage experience is gained in its long term use without any fetal harm.
For drugs like cetirizine and loratadine there are no  controlled data in human pregnancy and have been assigned to pregnancy category B by the FDA. These drugs are recommended for use during pregnancy when need benefit outweighs risk. They are excreted into human milk. Hence their use is not recommended in nursing mothers.
Like cetrizine, montelukast and zafirlukast have been assigned to pregnancy category B by the FDA.
Cyclosporine and prednisone have been assigned to pregnancy category C by the FDA and are potentially harmful to fetus.

Avoidance of triggers or exacerbating factors

In some cases of chronic urticaria the triggers are identifiable. In such cases avoiding the trigger itself is the treatment. However in idiopathic urticaria the causes are not known. Avoiding the possible causes may bring relief to the patient affected by the idiopathic allergy.

• Avoid tight fitting clothes, shoes and belts.
• Try to keep your surroundings cool.
• Avoid hot or cold baths.
• Avoid stress and tension.
• Do not do strenuous exercise.
• Inform the doctor about your proneness to urticaria when he prescribes medications.
• Avoid possible food triggers.
• Avoid exposure to sun.
• Avoid exposure to cold winds.
• Avoid exposure to germicides, pesticides and detergents.

Avoiding the triggers and proper and complete treatment will help in resolving chronic idiopathic urticaria without any skin scars, blemishes or discolorations.

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Topic of interest:
Types of urticaria - Types of physical urticaria

Reference:
1. Kaplan AP, Greaves M. Pathogenesis of chronic urticaria. Clin Exp Allergy. 2009 Jun;39(6):777-87. Epub 2009 Apr 22.

Idiopathic guttate hypomelanosis

White bumps on skin, lips, fingernails, teeth, tonsils and genitalia > Idiopathic guttate hypomelanosis > Causes - symptoms - diagnosis > Treatment Idiopathic guttate hypomelanosis are acquired white spots of hypopigmentation on the skin usually on shins and forearms.

The name of this disorder is self-explaining about the problem.

The reason for these white spots is not clearly known (Idiopathic).

The spots (macules) are 'drops' like (guttate), small in size (2-5 mm) and hypopigmented (hypomelanosis).

In some cases lesions measuring up to 10 mm diameter have been observed.

The causes for these white spots is not completely investigated and it is believed that sun exposure causes it.

It is further believed that the UV range of the sunlight could be the culprit.

These tiny white spots are usually formed on the forearms and shin regions of the body which are usually exposed more to sunlight.

They may also form on the other exposed parts of the body like shoulders, neck and face.

These white spots have been found to affect far more women than men.

Fair skinned people are found to be affected more frequently and at a younger age.

This disorder usually begins around the age of 30 years and it is also believed to be the part of the aging process.

Idiopathic guttate hypomelanosis on forearm

Idiopathic guttate hypomelanosis, typically develops on the legs, more particularly on the shins of the fair-skinned women in their early thirties.

Later idiopathic guttate hypomelanosis slowly progresses to cover forearms, shoulders and neck.

A familial (genetic) acquirement of these idiopathic guttate hypomelanosis white spots has been noted, requiring further research in this aspect.

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Idiopathic guttate hypomelanosis white spots - treatment

White spots on skin, lips, fingernails, teeth, tonsils and genitalia > Idiopathic guttate hypomelanosis > Causes - symptoms - diagnosis > Treatment - medication
Idiopathic guttate hypomelanosis treatment includes application of topical steroids or retinoids, dermabrasion or microdermabrasion, cryotherapy, cosmetic cover-up, surgery and grafting. As the white spots are completely harmless best way for this hypomelanosis is to cover them up with cosmetics and forget.

Even if treatment is carried out fresh white spots may keep appearing at new areas.
For individuals conscious about aesthetic appearance cure is available.

Idiopathic guttate hypomelanosis treatment with retinoids

Retinoids like tretinoin have been used with some success in removing guttate hypomelanosis.
Tretinoin is the acidic form of vitamin A and it should be used with caution by people with sensitive skin as it can cause redness, burning and itching.
To avoid these problems the frequency of application must be increased slowly.
Tretinoin applied hypomelanosis lesions can get severe sunburn and exposure of these areas to sunlight must be avoided.
Topical corticosteroids have been found to alleviate the white spots condition to some extent.

Dermabrasion or microdermabrasion for idiopathic guttate hypomelanosis

Dermabrasion or microdermabrasion may also be considered in the treatment of this disorder.
These procedures must be done by a trained Aesthetician or a dermatologist as improper therapy may leave greater scar marks.
Dermabrasion is a painful process to be done under general or light anesthesia. Microdermabrasion is not very painful and can be done at cosmetic spas.

Idiopathic guttate hypomelanosis treatment by cryotherapy and surgery

Cryosurgery or cryotherapy also have been tried successfully. In this method of therapy white spots are frozen resulting in the death of thin layer of skin at the affected area.
Soon the normal skin takes over and cover-up the dead skin and the white spots disappear.
Surgical removal of the affected skin and grafting of the healthy skin has been successful.
Although these procedures may remove the current hypomelanosis, there is no treatment to stop fresh lesions from appearing. Idiopathic guttate hypomelanosis on leg
Hence it is advised to tackle the root cause. Sun tanning and tanning beds may be avoided by young fair-skinned individuals, especially young women, to prevent possible idiopathic guttate hypomelanosis white spots at a later life.