Hypersensitivity Reaction

An exaggerated body's immune response to certain allergens causes hypersensitivity reactions. Potential allergens are pollens, bee venom, drugs, food items, etc. Four types of hypersensitivity reactions are anaphylaxis, cytotoxic, immune complex, and delayed reactions. Examples include allergic rhinitis, conjunctivitis, drug-induced hemolytic anemia, contact dermatitis, food allergy, hay fever, angioedema, atopic eczema, erythema, etc.

  
Recently Answered Questions

All the answers published in this website are written by verified medical doctors, therapists and health experts. The Content has been moderated by iCliniq medical review team before publication. Post your medical clarifications on iCliniq by choosing the right specialty and get them answered. Your medical queries will be answered 24/7 by top doctors from iCliniq.

My baby has got a pimple-like spot on his forehead. Please help.

Query: Hello doctor, My 1.4 year old baby has a pimple like spot on his forehead. Kindly provide me the remedies for the same.  Read Full »


Answer: Hi, Welcome to icliniq.com. I have read through your query in detail. Please find my observations below: 1. Pimples in a baby are a common occurrence. Simple remedies might help to prevent recurrence. 2. Please wash the area including the face with mild shampoo or soap especially made for se...  Read Full »

I have red bumps around my penis after shaving. Please help.

Query: Hello doctor, I had shaved my pubes and hair between my anus two days ago. A few hours after shaving, I experienced severe itching, so I applied moisturizer and baby powder. But today I noticed a few red bumps and rashes around my penis and between my anus. Also, the skin on my balls has become dry...  Read Full »


Answer: Hello, Welcome to icliniq.com. Some skin types are sensitive to blades, and the reaction that you described looks like hypersensitivity of your skin to the blade. Also, it could be because of using an unclean blade. I suggest you use the Montair LC tablet (Levocetirizine, Montelukast) two times a ...  Read Full »

I have white patches in my throat. Is it oral cancer?

Query: Hello doctor, I have been having oral symptoms for the last six months or so. I also have been a heavy drinker for the past seven to eight years. I discontinued this in January of this year. Started in the fall of last year with allergy, cold symptoms and has continued to the present day even gettin...  Read Full »


Answer: Hello, Welcome to icliniq.com. It is good that you stopped drinking. Meanwhile, I do not find any cancerous lesion in the pictures you sent (attachment removed to protect patient identity). However, none of the pictures show the posterior pharyngeal wall. If you can take a better picture it will be...  Read Full »

Why do I have the appearance of a rash after bathing?

Query: Hi doctor, Daily after my shower, my face turns red with rash. This has been happening since years. I have changed my soap and face wash several times. Besides, I have lived in many cities; this happens every time and everywhere. What could be the reason? What should I do for it? Please help.  Read Full »


Answer: Hi, Welcome to icliniq.com. From your history it appears that, you are suffering from cholinergic urticaria or heat hives. This condition of being hypersensitive or extremely sensitive to heat or the response of sweating. People with this condition often wonder why they feel itch when they exerci...  Read Full »

I have multiple, small, itchy bumps on my skin. Please help.

Query: Hello doctor, I have had multiple, small colorless bumps on my skin for the past few days. Some of them are itchy. Some turn red after scratching and they are mainly on my arms, hands, and back. I have no history of allergy and have not eaten or touched anything in particular on the day it started. ...  Read Full »


Answer: Hello, Welcome to icliniq.com. I went through your query and understood your concern. It appears to be a hypersensitivity reaction to an itch mite. If night aggravation of itching is present, it is typical of scabies. So, I suggest you follow the instructions mentioned below. 1. Apply Fucibet (F...  Read Full »

Why do I get allergies during specific months every year?

Query: Hello doctor, I am a boy, 18 years old. For the last three years, I am facing an allergy in which I face difficulty in breathing, coughing, and sound produces while breathing. The problem increases at night and I wake up nearly 4 to 5 times during my sleep and sit for a while. This is my fourth year...  Read Full »


Answer: Hello, Welcome to icliniq.com. You seem to be suffering from airway hyperreactivity disorder, the common colloquial term being an allergy. This occurs because your respiratory pathway is more sensitive to some day to day substances which others are able to tolerate without any problem. When such a...  Read Full »

How can I prevent Dapsone hypersensitivity syndrome while taking Dapsone 100 mg?

Query: Hi doctor,I have been put on tablet Dapsone 100 mg daily for dermatitis herpetiformis and granulomatous rosacea. It has only been a week, and the medications are working, and I am so happy. However, after reading about Dapsone hypersensitivity syndrome, I am very concerned. Other doctors have told m...  Read Full »


Answer: Hello, Welcome to icliniq.com. I understand your concern. Dapsone works well in dermatitis herpetiformis. It is the drug of choice for this condition. It usually starts working within 48 hours, so the results are excellent and almost miraculous, as you mentioned in your experience. In practice, Da...  Read Full »

I am experiencing itching, mainly on the legs, after taking a bath. Why?

Query: Hi doctor, I am a 24 year old male with a height 6' 2" and a weight of 189 pounds. I have been experiencing itching after taking a bath, mainly on the legs, and I am not taking any medications. Is it fine?  Read Full »


Answer: Hello, Welcome to icliniq.com. I understand your concern. As per the history provided, the condition may be cholinergic urticaria. It is a condition where rashes and itching appear for a few hours following a shower due to temperature changes pre and post-shower. It is a hypersensitivity reaction...  Read Full »

What can be done for dry lips with itchiness and redness?

Query: Hi doctor, I have been experiencing dry lips and around my mouth which is itchy and gets red. I have used all sorts of lip balm but nothing seems to be working. I drink lots of water throughout the day as well. This is getting me really worried now. Can you help, please?  Read Full »


Answer: Hi, Welcome to icliniq.com. I have gone through your case. Immediately stop using all different types of lip balms and lipsticks. Apply 1 percent of Hydrocortisone ointment and apply two times a day for seven days. After that, apply only Petroleum jelly or Vaseline twice daily for the next seven d...  Read Full »

What to do for premature ejaculation in a 20-year-old male?

Query: Hello doctor, I am a 20-year-old male. I am having premature ejaculation problems. It has started sometime back and it may sound weird. I went from barely feeling anything and lasting an hour for before three years, to being almost hypersensitive and lasting 10 seconds tops for the past six to eigh...  Read Full »


Answer: Hello, Welcome to icliniq.com. Brief answers include, behavioral approaches during sexual activity, sexual counseling, avoiding anxiety and stress factors, and taking antidepressants (serotonin group drugs). Detailed answers include, if I am your physician, I would suggest you with behavioral approa...  Read Full »

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