Allergies can be relieved (slightly?) by bananas.
Same for headaches/migraines.
Thx to user @Sam7010 for telling this useful knowledge.
Also
22 Foods and Drinks to Help Get Rid of a Headache or Migraine
Help :
1. Decaffeinated coffee
2. Green tea
3. Peppermint tea
4. Ginger tea
5. Water...