Author

David Brennan

David Brennan, RN, is a health writer for Biology Insights specializing in everyday dermatology and skin conditions. He holds a Bachelor of Science in Nursing from Western Michigan University. Brennan worked five years as an outpatient dermatology nurse before reviewing patient photos for a virtual triage service in Casper, Wyoming, where he still takes shifts.

Why Your Nose Turns Purple: Causes and What It Means Skin & Hair
Red Dot on Your Arm: Causes and When to Worry Skin & Hair
Why Is My Skin So Dry All of a Sudden? Causes & Fixes Skin & Hair
Why Was My Skin Darker When I Was Younger?Skin & Hair
Why Does My Skin Stay Indented?Skin & Hair
What Causes Purple Spots on Skin and Are They Serious?Skin & Hair
What Does It Mean When Your Belly Button Is Red?Skin & Hair
Why Are My Hands So Wrinkly? Causes and Solutions Skin & Hair
Why Do I Have a Bump on My Nose Where Glasses Sit?Skin & Hair
Why Does My Arm Have White Spots?Skin & Hair
Can Too Much Salt Cause Itchy Skin?Skin & Hair
How Long for Skin to Shrink After Weight Loss?Skin & Hair
Why Do I Keep Getting Boils All Over My Body?Skin & Hair
Why Is My Leg Green? Causes of Skin Discoloration Skin & Hair
Are Moles Contagious? And Why Do We Get Them?Skin & Hair
What Are the Causes of Sores on Your Head?Skin & Hair
What Drugs Make Your Skin Peel?Drugs
What Causes Moles and Skin Tags to Appear?Skin & Hair
What Is Paper Skin Disease and How Is It Treated?Skin & Hair
What Do Wrinkled Palms Indicate About Your Health?Skin & Hair
Why Do My Knees Have Dark Spots?Skin & Hair
What Causes Telangiectasia on the Breast?Skin & Hair
Why Does My Skin Look Leathery? Causes and Prevention Skin & Hair
How to Fix Loose Skin on Stomach: What Actually Works Skin & Hair
Can Softened Water Cause Skin Problems?Skin & Hair
Why Do I Have Little Bumps Behind My Ears?Skin & Hair
What Does a Liver Rash Look Like? Common Skin Signs Skin & Hair
Why Does the Tip of My Nose Itch? Explained Eyes & ENT
Why Is My Nose Rough? Causes and What to Do About It Skin & Hair
Why Is My Skin So Dry When I Drink Lots of Water?Skin & Hair