Can you have an allergy to almond milk and if so, what are the symptoms?

Yes: It is usually due to a tree nut allergy (almonds). The symptoms of food allergy can range from strictly skin symptoms to GI to respiratory, etc. If GI upset is the sole symptoms, then it might not be a true food allergy but more of a food intolerance. Seeing an allergist for testing could help to confirm or refute the diagnosis.

Food allergy symptom: Any food can cause an allergy, and nuts like almonds cause allergies pretty often. Food allergy symptoms can affect many different organs and are unique to each person: itching (any or everywhere), stomach distress, abdominal pain, nausea, vomiting, diarrhea, gas, hives, asthma, nasal congestion, headache, swollen lips, throat closing, joint pains, eczema, weird rashes--you name it.