Nasal lavage
This is called nasal irrigation.
Sinus lavage is the medical term meaning washing of nasal sinuses. Sinus lavage may be performed for therapeutic or diagnostic reasons.
The medical term for washing the nasal sinuses is "nasal irrigation" or "nasal douche." It involves flushing out the sinuses with a saline solution to help alleviate congestion and improve breathing.
Displacement Therapy
Nasal polyposis, or nasal polyps, is overgrowth of nasal mucosal tissue. Hypertrophy of the turbinates is another kind of overgrowth of nasal mucosal tissue. Rhinophyma is overgrowth of the external nose.
A polyp is the medical term for any overgrowth of tissue from the surface of a body organ.
The term for bloody nasal discharge would depend on what the fluid is that is coming out. If you are referring to just blood coming out then the term is epistaxis.
The medical term for the collection of lymph tissue in the oropharynx is "adenoids". Adenoids are a mass of tissue located at the back of the nasal cavity and play a role in the immune system by helping to fight infections.
Rhinitis is the medical term meaning inflammation of the nasal mucosa. Causes can include allergies, irritants, or infection.
Rhinitis is inflammation of the nasal mucous membranes.
The medical term for bleeding within the muscle tissue is intramuscular bleeding.
Osteosarcoma is the medical term meaning connective tissue cancer of bone.