It is about “How to be safe if you go walking in the countryside or the mountains”. (not sure if this is a mistake)

Oops, I didn’t know that… (Does this sentence really belong here?)

It is good for health because it involves both physical and mental work.

However, trekking isn’t a relaxing activity; it has its risks.

So, here you have some advices and tips that may be useful for you: (advice is uncountable)

Anyway, if the animal attacks you, just try to give it something to bite, like a branch, a hat or a bottle of water; anything but your body.

I you get a blister on your feet, stop walking and find the reason of the irritation.

If it’s caused by some fold of the sock or loose shoe, try to correct it.

If the slight pain continues, take off the other sock or use a handkerchief as an additional protection.

It is very important to use some good footwear to avoid this problem.

If you get stuck in a storm, the best you can do is to look for an open space and to bend down as nearest to the ground as it’s possible.

If suddenly your hair stands on end and you taste like copper, it means a thunderbolt is going to strike nearly.

Try to stay down, squatting on your toetips.

You must never lie down on the floor, because you might get an electric shock if a thunderbolt hits around.

[A stabbing of pain on the abdomen]

If this happens to you, slow down the walking or stop it completely and put your arms up.

With your arms extended, stretch your body to the opposite side of the pain.

To prevent this pain, you should keep a diet based on easily digestible foods like bread or bananas, and sports drinks, especially before the walking.

And it’s essential to keep yourself hydrated during the whole exercise.

Spending much time under the sun could be a health hazard for you if you don’t take the necessary cares.

You should also put some sun block cream on your face and every part of your body exposed to the sunlight.

Try to walk slowly and then increase the speed of the walking to check the importance of the lesion. (injury sounds more natural)

If you can walk quickly without feeling any pain, just go back your home.

Once you arrived home, put some ice on your ankle and keep it raised.

Making a list of the things to carry on with you could save you from being in troubles.

Insect repellent, a first-aid box, a map, a compass, a knife, a flashlight, some food rich in carbohydrates, water, an extra pair of socks, a raincoat or windbreaker, a hat and gloves are some of the items you must take note of.

Finally, after taking all these things in consideration, it only rests you what's left is to spend enjoy an entertaining experience, breathing fresh air and watching the beauties of our mother nature. (To avoid repeating "enjoy")

Trekking: as healthy as it is dangerous

It was about “How to be safe when you go walking in the country or the mountains”. - "how to be safe" could also be "how to take care"

I’m posting it here hoping that you could correct my mistakes. - that's ok but "...here in the hope that..." sounds slightly better

-- Trekking: as healthy as it is dangerous --

How to prevent and face some of the common risks of doing trekking - face is okay but "respond to" is also ok. "while trekking" might be good as well

If you love being outdoors, going for a walk through forests or the mountains or just walking for a long time, then trekking is ideal for you.

It's good for your health because it involves both physical and mental work. - "work" is an okay word but "exercise" might be better because "work" is a bit more of a negative word

If you’re thinking of doing it, you must take care of several things… for example; do you know what to do if you encounter a bad-tempered dog? - more natural

Obviously you can’t always prevent these kinds of things from happening, but at least you can learn how to survive them (get through them). - just more natural choices

So, here is some advice and some tips that may be useful for you:

If a dog comes barking and growling at you, don't run away: the animal may run after you. - "grunt" is an unusual word. It's more like a noise a human makes when he's annoyed or been hit.

Don’t use your arms to defend yourself; the dog could see it as an act of aggression.

Just try to move away slowly to avoid a possible attack. - or maybe "to avoid angering it"

Anyway, if the animal attacks you, just try to give him something to bite, like a branch, a hat or a bottle of water; anything except your body.

If you get a blister on your foot, stop walking (take off your shoes) and find the cause of it.

If it’s being caused by the sock or because your shoe is loose, try to fix it.

If the slight pain continues, take off the other sock or use a handkerchief for additional protection. - maybe instead of "slight pain" you could use "irritation"

This way, you’ll be able to go on. - or "able to continue with your journey"

But when you have finished the exercise, clean the affected area and put some cream and a bandage on it.

If, suddenly, your hair stands on end and you taste copper, it means a lightning is going to strike any second.

Try to stay down, squatting on your toetip the tips of your toes.

You must never lie down on the floor, because you might get an electric shock if lightning strikes near you.

[A stabbing pain in the abdomen] - "stomach" is a more common word but it's no big deal.

If this happens to you, walk slower or stop it completely and put your arm up in the air.

With your arm extended, stretch your body, opposite to the area of pain. - tricky sentence

To prevent this pain, you should keep try to maintain a diet based on of easily digestible foods like bread or bananas and consume sports drinks, especially before the walking.

Spending too much/a lot of time under the sun can be a health hazard for you if you don’t take the necessary cares precautions.

One thing you can do [more natural] is to wear a hat to reduce the risk of getting sunburned or suffering from heat exhaustion.

You should also put some sunblock or sun tan lotion on your face and every part of your body exposed to the sunlight.

Try to walk slowly and then increase the your walking speed of the walking to check the importance extent of the lesion injury.

If you can walk quickly without feeling any pain, just come back your home.

If your ankle is swollen, roll down your sock down to check if there are any bones out of place.

However keep your sock and shoe put on, because the compression pressure helps to avoid the swelling.

Once you arrive home, put some ice on your ankle and keep it in a raised position.

Making a list of the things to carry on with you could save you of from being in trouble.

Insect repellent, a first-aid box, a map, a compass, a knife, a flashlight, some food rich in carbohydrates, water, an extra pair of socks, a raincoat or windbreaker, a hat and some gloves are some of the items you must take note of. - first aid kit is also quite a common word

And always remember to try to leave some mark on those places where you could possibly might get lost. - might is a bit more natural

Finally, after taking all these things into consideration, make sure to have a good time it only rests you to spend an entertaining experience, breathing the fresh air and enjoying mother nature's beauty.