Thymus, which is behind the breastbone, is the place where certain white blood cells mature. If you thump your breastbone a few times each day with your fist, it would stimulate the thymus. Lymph nodes where the lymph gets cleaned are all over the body. You can gently massage the ones under your ears and under your arms. If you can find a professional therapist who can give you a lymph massage that would be best.
Lymphatic system is the second sewage system of the body.
Cleaning it is as essential as cleaning the bowels. One thing to remember is that lymphatic system is mostly active when the body is in motion, contracting muscles stimulate the lymph. Therefore, exercise is crucial in improving immunity since lymphatic system is such an integral part of the immune system. The final thing is that our bodies are capable of healing themselves completely with a little help and cooperation from us. Never underestimate the miracle and intelligence of the body.