All questions about ME/CFS and long COVID

What is a crash, and what helps?

A crash, or relapse, is when symptoms get worse for a period. It can follow an infection or unplanned activity, or have no clear cause. More rest and breaks help.

The full answer, with the sources, is in the guide.

Sources

• NHS: ME/CFS, treatment
• NHS: ME/CFS, symptoms
• CDC: Symptoms of ME/CFS

Reviewed 2026-11-09 · next review 2027-11-09