Welcome to HealthcareMagic Forum.
cold foods and cold air,water can cause an allergic reaction
,more so associated with nose block,cough,wheeze,headache,etc.
The best remedy would be to avoid the allergen and you must also get your self evaluated for sinusitis
which is a common cause of headache and nose blocks.
drops for de congesting the nose blocks, steam inhalation with a capsule of camphor/vicks
could help a lot .Keep away from dust and AC's
Wish you good health