Swelling at site of tumour 6 weeks post radiation

I am 6 weeks post 35 sessions radiation for HPV + tonsil cancer T2N0. Have had all the usual after effects but fortunately not to the extent as some. Main problems now is loss of appetite and altered taste so forcing myself to eat and topping up with ensure shakes but am worried by continuing swelling at site of tumour and side of tongue. Is this normal. Thanks.