Thanks for writing to health care magic forum.
Since you are c/o frequent throat infection
as well as nasal block,a thorough check up to evaluate tonsillitis
as well as sinusitis has to be done.Cetirizine
is usually prescribed to relieve nasal block.
For cough as well as throat infection,cough syrup with dextromethorphan
is usually administered.
Avoid intake of cold fluids as well as foods.
Gargle frequently with lukewarm saline.
Avoid exposure to cold climates.
Hope this helps.