Author

Callum Hartmann Page 5

Callum Hartmann is a senior writer at Biology Insights specializing in dermatological health. Living in Tacoma, Washington, he applies scientific training to explain surface symptoms affecting the skin, nails, and lips. Hartmann worked on a fashion magazine copy desk and studied science journalism, having received a bachelor’s degree in communications.

Can I Wear Fake Nails With Onycholysis?Skin & Hair
Why Is My Tongue Wrinkled? Causes and When to Worry Gut & Kidney
Can Depression Cause Dark Circles Under Eyes?Mental Health
Do Beau’s Lines Go Away? And How Long Does It Take?Skin & Hair
What Are Terry’s Nails and What Do They Indicate?Skin & Hair
What Causes Splinter Hemorrhages?Skin & Hair
What Are Beau’s Lines and What Causes Them?Skin & Hair
Can Anxiety Cause Petechiae? The Link Explained Immunity
Why Do You Get Sunken Eyes When You’re Sick?Skin & Hair
Does HIV Cause Dark Circles Under Eyes?Immunity
What Is the Water Content of a Healthy Nail?Skin & Hair
Why Do My Lips Get Chapped When I’m Sick?Skin & Hair
Can I Paint My Nails With Onycholysis?Skin & Hair
Can Gel Nails Cause Cancer? The Risks Explained Cancer
What Color Are Crow’s Feet and Why Do They Appear Darker?Skin & Hair
Why Do My Lips Get Stuck Together?Skin & Hair
Why Do I Have a Line on My Lip?Skin & Hair
Why Do Some People’s Tongues Have Cracks?Dental
Why You Shouldn’t Lick Your Lips When They’re Dry Skin & Hair
How to Prevent Black Lips From Smoking Skin & Hair
Why Do My Lips Feel Like Plastic?Skin & Hair
Are Bruises Blanchable? The Science Behind Non-Blanching Skin & Hair
What Causes Roast Beef Lips and How to Treat Them Skin & Hair
How to Get Rid of Lip Licker’s Dermatitis Skin & Hair
What Causes a Pink Bottom Lip?Skin & Hair
Are Beau’s Lines Serious? What They Say About Your Health Skin & Hair
Can You Get a Freckle on Your Lip?Skin & Hair
What Causes Terry’s Nails? Signs of Systemic Disease Skin & Hair
Can You Get Freckles on Your Tongue?Skin & Hair
What Causes the Palms of Your Hands to Be Red?Skin & Hair