Muscle soreness that emerges 12 to 24 hours after your workout is called “delayed onset muscle soreness”. It occurs due to minute muscle tears that occur during the workout. It usually resolves in three to five days, and you can continue working out even with soreness. Cold packs, warm showers, massages, and analgesics may help relieve the soreness. If your soreness persists for longer than a week, consult a doctor.