The brief, itchy red spots that appear in one place and clear within hours before recurring elsewhere sound more like hives (urticaria) than a fixed rash, though an examination is needed. Triggers can include new foods, medicines, heat, pressure, infections or other exposures; a photo during an episode is useful.
Next Steps
Track possible triggers and avoid any newly started product or medicine until reviewed; do not scratch. Seek urgent care for lip/tongue swelling, breathing difficulty, dizziness or vomiting. Share a clear rash photo in a Practo consult or visit Synergy Multispeciality Hospital, Miraj for confirmation and treatment.