Can Satan or jinn do physical harm to a person? If so, does isolation of a person help them to do that more in any way? Or is whispering to us to do bad his only act?
If you ask will they come and slap us while we're alone, then I would say I'm not sure about it, if such incidents have ever occured.
But if you ask will they cause us to slap ourselves then the answer is YES.
This second one they accomplish only by whispering in our hearts and commanding us to slap ourselves (how? that depends on Satan's trick).
Also, as Hamza Islam said, isolation couldn't be considered as a factor, it is the measure of remembrance of Allah which could be considered a factor, since
And whosoever turns away (blinds himself) from the remembrance of the Most Beneficent (Allah) (i.e. this Quran and worship of Allah), We appoint for him Shaitan (Satan - devil) to be a Qarin (an intimate companion) to him. (Qur'an 43:36)
I suggest, you to watch this, a bit long though, but a good one - Getting started with Jinns
May the creator guide us all.
Yes, the jinn can physically harm us. The jinn can possess us as well (stay inside human beings and control the body to certain level, sometimes fully).
Yes, they can whisper to us as well, as it is made clear in Surah Al-Nas of Quran.
Isolation doesn't matter much if someone is possessed by the jinn. If they wish to harm us, they can harm us even if we are not in isolation.
Yes, they can physically harm us. They can also whisper in your ears as you said, but keep in mind that just like there are good and bad humans, there are also good and bad jinns, and there are even Muslim jinns (although you would never come across one, because it is forbidden for jinns to interact with us in any way just like we can't interact with them). Regarding the isolation of a person, yes that may have an effect, as jinn generally like to stay where people aren't. May Allah protect us from the shaytaan alrajeem, and from all evil, amen.
Assalam ol Alaikum wa rahmatollah. In order to reply to your attractive question that is "Can Jinns and Satan harm people physically?", I am telling you that Yes, it is possible that jinn harm people. But there is an important matter that you should be aware of, and that is about the limitation of their abilities and power to do that. In fact they cannot harm wherever and whoever. Then you should not worry much about it.
So to be confident, you may recite Quran or other duas like : Besmellahe rahmane rahim, La hawla wa la kovata ela bellah al aliel azim. (According to my medium knowledge)
They can't physically attack us viz can't slap. they even not communicate with us without medium. But they able to attack our thought. descend on us or may influence others, Human or other creature to attack us.
And remember Our servant Job, when he called to his Lord, "Indeed, Satan has touched me with hardship and torment." - 38:41
Jinn cannot communicate nor harm us unknowingly or knowingly. The jinns live in other world whereas humans live in other world. Jinn can only cause harm if we call them for e.g.: witchcraft, black magic, fortune telling, etc. These are the things that can make a jinn cause harm to you and also kill you . If you did any of these the jinn will not leave us they can scare us, unless it can be cured by Quran. May Allah protect us from these.
You can do the following things to prevent being possessed by jinn:
- remember allah and prophet muhammed(SAW) every time
- recite ayat-ul-kursi and do read Quran on daily basis
- do thikr