Allergic reactions usually happen within a few minutes or a few hours after being exposed to the substance or food that you are allergic to. The symptoms can show up immediately in several cases- if it is an allergic reaction to dust, pollen or some food when the body's immune system starts the immediate defence mechanism by throwing up the symptoms. The immune system releases a substance called histamine which shows up as these reactions like sneezing, skin rashes, headache, running nose, nausea and so on. In some people the reaction can be immediate and severe; whereas in others it can be delayed and mild. Some life-threatening allergic reactions need immediate emergency treatment too.
Some allergic reactions can bring about shortness of breath, palpitations of the heart and the person need medical attention immediately. People who have an intolerance to certain foods can have difficulty in digesting the food, and as a result symptoms like nausea, headache, bloating, gas can occur which leads to the development of an ulcer.
In some people, the symptoms are present throughout the year but in some others, the symptoms can be severe and the suffering very high, like in the case of Asthma patients who suffer during winter and rainy season but are quite alright during summer.
A family history of allergies is also a known factor, which may pass down the generations.
Symptoms of Allergy can be various and can be listed as below:
Sometimes obesity and hypertension are also the outcome of long tenure allergic suffering.
Diseases identified are many and can be listed out as below:
- Skin Diseases – rashes, itching, redness, swelling and blotches
- Headaches – mild to severe, on one side or throbbing headache.
- Respiratory diseases – wheezing, coughing, shortness of breath, respiratory tract infections, rough voice, throat tightness, throat irritation, feverish and nasal congestion.
- Obesity – formation of diverticulitis which is small pouch-like structures. These are weak spots in the lining of the digestive system. Symptoms include stomach pain, fever and rectal bleeding. Fat deposition and hence obesity is a major risk factor.
- Gastrointestinal –diarrhea, nausea, vomiting, constipation, stomach pain, bloating. Some of the diseases of gastrointestinal are Ulcerative colitis, Crohn's disease (inflammatory bowel disease), gall stones, burning sensation in the chest when the stomach acid rushes to the esophagus called acid reflux, celiac disease – which is a serious sensitivity to gluten found in wheat and anal fissures – when bleeding and pain occurs after every bowel movement. Sometimes there can be inflammation of the blood vessels in the digestive tract which can lead to haemorrhoids. These can be painful and itchy too.
- ADHD-Attention deficiency hyperactivity disorder – sometimes children with allergic diseases can develop ADHD too. Sleep disorders, stress and depression and hyperactivity can be the result.
- Irritable Bowel Syndrome – a feeling of bloating, loose stools, cramping, abdominal pain and passing gas frequently without control. Intestinal walls getting damaged as a result.
- Diabetes – long term uncontrolled diabetes, fluctuating blood sugar levels in the body, leading to lesser immunity and making the patients prone to allergies. Chronic constipation, difficulty in bowel movements, extreme fatigue, listlessness, very less energy are some of the symptoms.
- Joint Pain – unexplained body pain and joints pain. A feeling of lethargy since there is no exercise to the body.
- Fatigue – Extreme weakness, struggling with simple activities, pulling yourself out of bed, going through the daily chores mechanically and losing interest in life due to the tiredness.