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Nov 5
4 min

Hair Dye Allergy From PPDA (para-phenylenediamine): How to Avoid It and What to Use Instead

What is PPDA? PPDA is a chemical, and it's the main coloring agent in hair dyes. The chemical name is para-phenylenediamine. The che...

The Chronic Idiopathic Urticaria Elimination Diet: The Foods to Avoid If You Have Chronic Hives

Rajani Katta MD

Apr 22
8 min

The Chronic Idiopathic Urticaria Elimination Diet: The Foods to Avoid If You Have Chronic Hives

An elimination diet may help in chronic hives (urticaria). Food triggers include alcohol, tomatoes, additives, herbs, seafood, and others.

How to wash your hands to protect yourself against coronavirus while still protecting your skin

Rajani Katta MD

Mar 12
8 min

How to wash your hands to protect yourself against coronavirus while still protecting your skin

Handwashing is important to protect against coronavirus. To protect your skin, learn the right techniques and skin care products

Allergic reactions to lip balms and chapsticks such as Burt's Bees, Eos, Blistex, Carmex, and others

Rajani Katta MD

Mar 3
8 min

Allergic reactions to lip balms and chapsticks such as Burt's Bees, Eos, Blistex, Carmex, and others

Lip balms and chapsticks from Burt's Bees, Eos, Blistex, Carmex, Chapstick, and others may trigger allergic skin reactions of the lips.

Allergic Skin Reactions to Natural Deodorants Such as Tom's of Maine, Schmidt's, and More

Rajani Katta

Feb 20
2 min

Allergic Skin Reactions to Natural Deodorants Such as Tom's of Maine, Schmidt's, and More

Allergic skin reactions may occur after using natural deodorants such as Tom's of Maine or Schmidt's, due to natural fragrance additives.

Dermatology Warning: Lavender in skin care linked to breast growth in children

Rajani Katta

Feb 13
2 min

Dermatology Warning: Lavender in skin care linked to breast growth in children

Multiple case reports have described a link between lavender skin care products and breast growth in children.

What you’ve heard about Preventive Dermatology on the Internet, and why so much of it is wrong

Rajani Katta MD

Jul 29, 2019
4 min

What you’ve heard about Preventive Dermatology on the Internet, and why so much of it is wrong

There are many myths on the internet about preventive dermatology, and it's important to know the facts and the research.

Rajani Katta MD

May 10, 2019
5 min

Choosing Sunscreens for Sensitive Skin

For people with sensitive skin, it's important to choose the right sunscreen. Allergic reactions can develop to the sunscreen chemicals

Allergic skin reactions in the underarm and armpit area: deodorants and other triggers

Rajani Katta MD

Nov 15, 2018
4 min

Allergic skin reactions in the underarm and armpit area: deodorants and other triggers

Allergic skin reactions of the underarm and armpit can be triggered by deodorants, skin care products, clothing dyes, and other substances.

Activated Charcoal and the Science of Skin Care: Some Promise, Lots of Hype

Rajani Katta MD

Oct 7, 2018
6 min

Activated Charcoal and the Science of Skin Care: Some Promise, Lots of Hype

While activated charcoal skin care products have become very popular, a closer look at the science finds that many are more hype than scienc

If You Are Allergic to Nickel, Try This Kind of Jewelry

Rajani Katta MD

Mar 27, 2018
5 min

If You Are Allergic to Nickel, Try This Kind of Jewelry

Many people develop rashes after wearing costume jewelry or other types of jewelry. In one of the most common scenarios, wearing certain ear

Shoe Allergy and Rashes on the Feet: What You Need to Know

Rajani Katta MD

Mar 20, 2018
5 min

Shoe Allergy and Rashes on the Feet: What You Need to Know

If you have a rash on the top of your feet or toes, one possible cause is shoe allergy. Different components of shoes can trigger allergic r

Skin and Ski: How To Protect Your Skin On Your Next Ski Trip

Rajani Katta MD

Mar 13, 2018
3 min

Skin and Ski: How To Protect Your Skin On Your Next Ski Trip

Can't you just picture it now? That sparkling expanse of pristine white snow. That cold, bracing air. That long, long soak in the hot t...

Allergy to Fragrance: Understanding Fragrance Additives and Choosing Products

Rajani Katta MD

Sep 11, 2017
3 min

Allergy to Fragrance: Understanding Fragrance Additives and Choosing Products

If you're allergic to fragrance, it can be very hard to avoid. There are hundreds of fragrance additives, and they're found in the v

Warning: "Fragrance-Free" Products May In Fact Contain Fragrance Additives

Rajani Katta MD

Sep 11, 2017
4 min

Warning: "Fragrance-Free" Products May In Fact Contain Fragrance Additives

Many products that are labeled as "fragrance-free" may legally contain fragrance additives. This is due to a loophole in the label

Allergic Skin Reactions on the Job: Occupational Allergic Contact Dermatitis

Rajani Katta

Sep 2, 2017
4 min

Allergic Skin Reactions on the Job: Occupational Allergic Contact Dermatitis

I've been performing patch testing for close to 20 years, and during that time I've seen many cases of allergies related to the workplace...

Rajani Katta

Sep 2, 2017
5 min

Allergic Skin Reactions in Athletes

Can you be allergic to work? Well, you can certainly be allergic to some of the tools or equipment or other exposures in your workplace. ...

Telogen effluvium: Sudden Rapid Hair Loss

Rajani Katta

Sep 2, 2017
4 min

Telogen effluvium: Sudden Rapid Hair Loss

Sudden hair loss. I've experienced it myself. Twice, in fact. The first time, I was traveling overseas for the summer. On my first night,...

Rajani Katta MD

Aug 27, 2017
4 min

Telogen effluvium: Sudden Rapid Hair Loss

Telogen effuvium results in sudden, rapid hair loss. When an event causes severe physical stress to the body, such as pregnancy, illness, su

Red eyelids: tips for facial and eyelid contact dermatitis

Rajani Katta MD

Jul 26, 2017
5 min

Red eyelids: tips for facial and eyelid contact dermatitis

Red, itchy eyelids may be due to allergic contact dermatitis. This allergic skin reaction can be due to cosmetics, hair care, and others.

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Hair Dye Allergy From PPDA (para-phenylenediamine): How to Avoid It and What to Use Instead

The Chronic Idiopathic Urticaria Elimination Diet: The Foods to Avoid If You Have Chronic Hives

How to wash your hands to protect yourself against coronavirus while still protecting your skin

Allergic reactions to lip balms and chapsticks such as Burt's Bees, Eos, Blistex, Carmex, and others

Allergic Skin Reactions to Natural Deodorants Such as Tom's of Maine, Schmidt's, and More

Dermatology Warning: Lavender in skin care linked to breast growth in children

What you’ve heard about Preventive Dermatology on the Internet, and why so much of it is wrong

Choosing Sunscreens for Sensitive Skin

Allergic skin reactions in the underarm and armpit area: deodorants and other triggers

Activated Charcoal and the Science of Skin Care: Some Promise, Lots of Hype

If You Are Allergic to Nickel, Try This Kind of Jewelry

Shoe Allergy and Rashes on the Feet: What You Need to Know

Skin and Ski: How To Protect Your Skin On Your Next Ski Trip

Allergy to Fragrance: Understanding Fragrance Additives and Choosing Products

Warning: "Fragrance-Free" Products May In Fact Contain Fragrance Additives

Allergic Skin Reactions on the Job: Occupational Allergic Contact Dermatitis

Allergic Skin Reactions in Athletes

Telogen effluvium: Sudden Rapid Hair Loss

Telogen effluvium: Sudden Rapid Hair Loss

Red eyelids: tips for facial and eyelid contact dermatitis

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