Immunity Boosting

The temperature range here is septic.  It usually neither gets too hot nor too cold during the year to seriously kill any germs.  This is also a very diversely populated country with many new immigrants, and lots of ports, so new strains of germs appear regularly.  So the first thing you need to do for your skin is keep your immune system healthy.  If you don't, you'll get sick often, and pick up the various fungi and bacteria plaguing public places.  The sanitation isn't so good here, so it's easy to get a skin problem just from touching the wrong bathroom sink.

Take a multivitamin daily, and drink plenty of water.  If you can handle it, try to drink a litre and a half of clear water, or water with a squeeze of lemon juice every morning before you eat anything else.  If you've been sick or feeling tired alot here, you'll feel the difference within a couple of days.

Also, pay attention to what Arabs here eat, and what they don't.  They do eat alot of fresh foods, and they don't eat alot of processed foods.  Olives are important, and so are hot peppers, and somewhat salty or vinegary salads.  If you don't have high blood pressure, you should eat some small portion salty food every day to help your body and skin to retain water.  Coffee with hel (cardamon) is good for you too, in reasonable quantities.  It can be hard on the stomach for some though.

Sun Protection

If you're Muslim, and haven't been wearing hijab, the Israeli summers will convince you of its practical virtues.  I don't mean just the knimar, but the good sense of wearing loose, flowing garments.  Those who wear revealing clothing here, though it is popular, suffer from terrible wrinkling on their face, cleavage, and thin skin on their hands, as early as their twenties.  If you don't want to go back home and told you look 10 years older even though you were just there last year, at least buy some shawls.

A head scarf, headwrap, or hat is also a good idea.  If you don't want to wear it too strictly, that's okay.  Look around, and you'll see lots of styles.  Many women here who aren't so religious wear a scarf loosely draped around the face, with their hair showing a bit.

Wear sunscreen no matter how dark you are.  Those hours do add up in time.  I recommend Sebocalm or AHAVA's moisturizer with sunscreen.

Sanitation

After nutrition and sun protection, portable sanitation supplies are the second most important skin saving items you can have.  There are also antibacterial wiped in the pharmacies.  Keep some wipes in your purse to wipe down areas where bacteria are often picked up.  Wipe down public toilets, or don't sit down on them.  Also try to find a dry sink to wash your hands in.  Use your own hand soap.

As far as hygiene, shower or at least take a washup daily.  It is difficult to shower daily in winter, since most of us here don't have central heating, and running electricity to heat water is very expensive.  If you can't shower, take a washtub of washing water, and another of rinsing water,  to a room where you have some heat.  Use one washtub to lather up and dunk your washcloth in.  Wring it out, and then use the water in the other tub to wipe off the soap lather.  It works pretty well once you get the hang of it.

Moisture

If you have dry skin, it is best to use a body oil in summer and a body butter in winter.  For the face, use a good moisturizing cream.  You may have to wash your face and reapply it a couple of times a day because it is very dusty here.  You may return home from work with a nasty sludge of dust, pollution, and oil on your face.  This is why special facial wipes are so popular here.  Use them.

Peeling

From the various traumas your skin may receive here, you may accumulate patches of dead skin, dry, flaky areas, and dark spots.  The solution for this is a weekly habit of peeling, also known as exfoliation.  Jade makes a rose hips peeling facial cleanser that I think is one of the best on the market here.  Great big loofah sponges are sold in most of the shouks,  Get one, and tear or cut a piece off as needed.

Therapy

You may have come across this article after some damage was already done.  In that case, here are some solutions:

Clammy, chafing, irritated skin in the folds of the body:

Dead Sea salt baths, unless you get irritated by it.
Agisten Baby - a combination zinc oxide and anti fungal cream.  Apply twice daily after washing.
Redskin Polygonum ointment - an ointment with polygonum extract, for prevention and relief of chafing.

Scars and hyperpigmentation:

Oblipicha oil - for the body
Oblipicha face cream - for the face
(available behind the pharmacy counter at Superpharm)

Dry hands:

Sea Beauty hand cream
AHAVA mineral clay  hand cream

Dry feet:
Sea Beauty foot cream

Dry lips:
L'Occitane or other shea butter
(more likely to find at local pharmacies than at large chains)