Nothing can compare to a a proper real-life diagnostic from a doctor.

But let's see what we can do here,
it will take some time and I am going out for dinner.


First of all, you must understand what is allergy.
Allergens may be something you came in contact with.
Eat, touch, inhale etc
Not all things are allergens, thank goodness.

some questions:
1) list down what you eat within the duration of 2 days before the allergic reaction began especially oyster sauce.
2) list down any recent medicine you took, 7 days prior to the attack.
3) All new chemicals, ie shampoo, soap, detergent, floor cleaner, especially fabric softerner.
4) Contact dermatitis: things you touch that may cause the reaction.

Will see the list before commenting further.

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Added on May 23, 2010, 6:48 pmYour bed-sheet? Fabric softener?


This post has been edited by duckaton: May 23 2010, 06:48 PM

Don't worry, allergy in your case is not life-threatening.
If you have a family history of allergy conditions,
what you can usually tolerate can suddenly become the allergen.

Start by ruling out the below one by one.

1) Most likely if your palm starts itching first
Contact dermatitis:
You will notice very small nodules on your palm, not raised like a mosquito bite.
Contains only water and is EXTREMELY itchy.
Scratching will not help, it will only puncture the skin. Heals without scars.
Likely cause:
Allergy to nickel, aluminium, ie coins, keys, metal shavings, rusts
even a single metal button on your jeans in contact with your belly can trigger it.

if not the above, then

2) If you get it every night mostly likely
Fabric softener ie your bedsheet
deodorant, facial wash or anything you use just before you got to bed.
(These contains metal ingredients too like aluminium etc)
Floor cleaner, handwash
Read the ingredients.

dust, mould in your aircond or bathrom. (but these will cause running nose)

if not, then

3) Something you eat:
Purposely eat some vege fried with lots of oyster sauce.

then if nothing happens within 48 hours
Eat some nasi lemak with chili sambal belacan

if nothing happens within 48 hours
Eat some rojak with prawn head paste

will comment further when the above is ruled out one by one.
Or better still, go see a doctor and ask him to recommend you a Allergist
Doctors usually only treat the symptoms.

Short term relief, available at any pharmacy:
Loratadine 4mg tablets (antihistamine)
Piriton 2mg tablets (relieves itchiness)
Elosone ointment for rahes (mild cortisone, steroid)
Take/apply as when necessary, symptomatically.

Goodluck.