Author

Callum Hartmann

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.

What Causes a Bare Spot on the Tongue?
Why Does My Tongue Look Purple? Possible Causes
Smoker’s Tongue: Symptoms, Causes, and Treatment
Is Geographic Tongue Contagious? Causes & Symptoms
Is Geographic Tongue Painful? Symptoms and Triggers
How to Get Rid of Pigmented Fungiform Papillae
Why Do Some People’s Tongues Have Cracks?
Why Is There a Black Dot on My Tongue?
Why Do I Get Pimples on My Tongue?
What Does It Mean When You Have Red Spots on Your Mouth’s Roof?