Persistent scalp itchiness can be extremely hard to treat. Readers offer possible solutions; we advise them to make sure the benefits outweigh the risks.
The FDA has a designation for drug reactions it considers especially worrisome: BOXED WARNING. Do prescribers warn patients? Not always!
Many readers have found that eliminating toothpaste with SLS (sodium lauryl sulfate) helps them avoid canker sores. What is SLS anyway?