Generally influenza B can heal on its own. If the patient has a strong immune system and has mild symptoms such as fever, headache, fatigue, loss of appetite, muscle aches, nasal congestion and runny nose, he or she can achieve self-healing by drinking more water, taking rest, strengthening nutrition and eating more fresh vegetables and fruits, etc. Generally, the general symptoms will improve in 3 to 5 days and fatigue can last for 1 to 2 weeks.
However, influenza B is contagious and easily aggravated, so you should seek medical attention for symptomatic and antiviral treatment when you feel unwell, and it is not recommended to wait for it to heal on its own. The elderly, those with underlying illnesses, or those with low resistance can experience exacerbation, organ failure and life-threatening conditions.