ask-the-doctor
Blood tests can show recent nicotine use, how heavily you’ve been exposed, and why traces may still appear days after your last cigarette.
Find out how estrogen-containing birth control can affect thyroid hormone replacement, and why your levothyroxine dose may need closer monitoring.
Discover what bilirubin is, why levels rise on blood tests, and how liver, bile ducts, or red blood cells can each play a role in hyperbilirubinemia.
A rise in thyroid-stimulating hormone after thyroid removal can have several explanations, from medication timing to changes in absorption.
A TSH result can be confusing without context. See what the number measures, how lab ranges vary and when other factors matter for thyroid health.
A lump under the chin that is getting larger should be checked. Find out what doctors look for and which tests may identify the cause.
Smoking affects eye health in several ways, but its connection to glaucoma is less clear. See what doctors recommend for people with glaucoma.
Chronic hives can be hard to control when testing does not reveal a cause. Explore possible triggers and treatments that may help bring relief.
Thyroid issues and blood pressure may be connected in more than one way. See how symptoms, lab results and treatment can affect your readings.
A common heartburn treatment may interact with an important heart medicine. Find out what to watch for and which options doctors may consider instead.