Redness in throat. Just help me out sir.

My son jaasiel, 5 years old, is under ur treatment sir. In first consultation u gave him azhithromycin and probiotic sachet , which we completed. Again he was having redness, u added mucolite, fenigra and levocetrizine... Which is also about to complete. But still redness is there inside wen i tell him to open mouth. Definitely it is less but not completely gone. He is not having any pain , no fever or any discomfort just one thing i noticed is his hands and feet gets very cool wen he run or plays actively and at night he has lil cough...We r avoiding cold things but he is eating lot of biscuits these days. After eating food also , he will say he wants to eat biscuit, feeling hungry. Actually this month his deworming was due... So that also i wanted to clarify. Can i deworm him along with current treatment as he is already taking levocetrizine at bedtime. Just help me out sir.