The Sunscreen Squad

Allergic to sunlight?

Posted in sunscreen by sunscreensquad on January 10, 2010

I was talking to someone the other day who says she develops red bumps on her skin within minutes when she is in the sun. She said if she uses sunscreen it helps a lot but she still gets this rash. I told her to use a mineral sunscreen like zinc because it blocks UVA more effectively.  Like most people (including myself a couple of years back) she had no idea what I was talking about.. I wondered how widespread her condition is? This particular lady was Asian with a dark complexion.

Here is what I found out about the various types of rashes caused by sunlight or heat;

Solar Urticaria
Cause: Exposure to sunlight. Not serious.
Symptoms: Itching, redness and hives on areas of skin within minutes of exposure to sunlight. Sometimes mistaken for sunburn, but appears quicker, and goes away within a day after sun exposure is stopped.
Prevention: Use broad spectrum sunscreen (blocks UVA and UVB).

Polymorphic light eruption: Common alergic reaction to sunlight. Not serious.
Cause: Exposure to sunlight
Symptoms: Red pimples,blisters or scaly skin appears from 1-4 days after sun exposure
Prevention: Use broad spectrum sunscreen (blocks UVA and UVB).

Sensitivity caused by topical creams or medication;
Your medication may be causing a reaction on your skin when exposed to sunlight. You may be even be allergic to sunscreen. If so, try a sunscreen with zinc or titanium dioxide as the active ingredient.

Cholinergic or heat urticaria
Cause: Increase in body temperature from hot showers, exercise, spicy foods, or panic/ high stress.
Symptoms: Chronic hives
Prevention: Basically, avoid being hot. Take cool showers with mild soap and wear loose, cool clothing. Don’t have too many covers on when sleeping.

Heat rash or prickly heat syndrome
Cause: Blocked sweat glands.
Symptoms: Inflammation and rash.
Prevention: As above, keep cool wear cool clothing, take cool showers with mild soap. Avoid any unnecessary creams or powders because they will make it worse.

You should see a doctor about these rashes just to make sure they are not serious diseases like
porphyria or systemic lupus erythematosus.


SunSCREEN vs SunBLOCK – different..

Posted in sunscreen by sunscreensquad on August 4, 2008

It is a shockingly widespread belief that sun cream gives you a super-human sun barrier. NOT TRUE!  It is an extremely important part of our skincare routine but certainly not a license to hang out in the sun all day long under the false assumption that we are safe inside an invincible shield

Basic things to know about sun creams:

*Sunscreen and sunblock works differently. Sunscreen contains chemicals which absorb UV. Some people may have an allergic reaction to these chemical absorbers. Sunblock is a physical sun barrier which deflects the sun’s rays. Active mineral ingredients in Sunblock are titanium dioxide and/or zinc oxide.

*SPF (Sunburn Protection Factor). The number on the label is basically a guide to the amount of protection you should have from sunburn. For example. If it takes your skin three minutes to develop a sunburn, and you apply SPF 15 (15×3=45) it will generally take you 45 minutes to develop a sunburn. Needless to say, the effectiveness of a sun cream is relative to your skin’s own natural sun tolerance, HOW MUCH YOU APPLY and to the intensity of the sun (time of day and distance from the equator).

*SPF is a measure for UVB radiation only. There is now a labeling system for the level of UVA radiation protection. Look for the stars on the label. The UK is currently using a FIVE star rating and the US is proposing to upgrade labels to include a FOUR star UVA protection rating alongside the SPF.

*Don’t skimp on the application!-The SPF coverage depends on how much of the cream is applied. Apply a liberal amount to the skin In order to achieve the effectiveness of the SPF on the label.