Questions tagged [pain]

Tag for questions pertaining the sensation of unpleasant sensory and emotional experiences associated with actual or potential tissue damage.

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8
votes
2answers
7k views

Do ants feel pain?

I have watched video on youtube where guy pours molten aluminium into fire ant colony to make casing. In the comments below there's huge discussion on is that a right thing to do. I am on the side ...
2
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1answer
64 views

How do painkillers prevent shock?

I was reading about the Placebo effect and came across this little story: The roots of the placebo problem can be traced to a lie told by an Army nurse during World War II as Allied forces ...
3
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2answers
2k views

Advantages of pain sensation?

The hazards of congenital insensitivity to pain (CIP) are well-known. This question is about the obverse: what selective advantage, if any, does the normal sensation of pain confer? I'm thinking of ...
3
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1answer
40 views

Surface perception

I'm looking for research studying: How small and compressed together do particles of a surface need to be to be perceived as solid surface to human touch? E.g. sand still feels grainy. Has there been ...
1
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1answer
132 views

Laparoscopic surgery: Why did the gas cause pain in my shoulder, and how did it escape my body? [closed]

I recently had Laparoscopic surgery, and the nurse told me I would experience pain in my shoulder and burping as the gas escapes my system. I looked up a bit of information on the "pain in my shoulder"...
3
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2answers
133 views

Reseach on feeling pain of other people

I'm more of a tech than bio kind of guy, but I have read and learned a lot alongside of my girlfriend's education. Which is very interesting!! Currently I want to investigate : people claiming to ...
1
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0answers
58 views

Why does it take 24 hours for tendons to give feedback on whether the loads they received were excessive?

I heard in this interview of Jill Cook (tendon researcher) on https://youtu.be/GKkSp-TlofI?t=230: Tendons talk to you 24 hours later. So what happens if if I put load on a tendon today, it will ...
0
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0answers
57 views

Why are isometric contractions more analgesic than isotonic contractions for tendon pain?

According to a randomized clinical trial {1}, isometric contractions are more analgesic than isotonic contractions for tendon pain. The explanation they give is as follows: The antinociceptive ...
0
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1answer
30 views

How do NSAID's work and what are the differnces between COX-1 and COX-2? [closed]

NSAID's work by slowing down the COX enzym, but how do does enzymes cause pain? because I've read that they're also needed for the body and do "good" things.
28
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3answers
12k views

Do oysters feel pain?

Do oysters feel pain when you bite into the inside, or when you crack open the shell? I tried google searching it to no avail. When you bite inside the oyster or when you break the shell to open the ...
10
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1answer
4k views

Why does it hurt more when you touch a nerve directly?

I am not a biologist nor know much about biology (so please explain in layman's terms) however I have always been curious as to why this is. What causes the difference in pain between touching an ...
1
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0answers
55 views

Sea Urchin Pain

Are sea urchins theoretically able to feel pain? They have output and input organs which would make them "vulnerable" to feel pain but on the other hand, they don't have brains. I was wondering if ...
1
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1answer
42 views

Does a severed limb/finger experience pain after its separated?

If a person ends up with a severed finger will that finger, after falling off, experience any pain and start writhing? Can a limb kind of have a mind of its own for a few more seconds after separating ...
7
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1answer
176 views

Does spinal cord have pain receptors?

I understand that the brain itself does not have pain receptors, so when the brain is damaged or cut, there is no experience of pain. For example, surgeons can operate on the brain while a patient is ...
17
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2answers
2k views

What is the cause that angina pectoris is felt in your left arm?

When someone has heart problems sometimes they feel pain in their left arm. But why is the left arm painful?
2
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0answers
313 views

How does lactic acidosis lead to pain?

I come from Physics, not biology. My understanding is that without sufficient oxygen present, the Krebs cycle terminates in lactic acid formation for the body to later continue the reaction when ...
4
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2answers
4k views

Why Do Nerve Signals Get Crossed?

First off, I don't know if this is a normal healthy thing to occur. There have been many times where I have an itch on say my arm and I scratch it, only to feel the scratching elsewhere on my body. I ...
5
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1answer
151 views

How do we share pain?

When somebody else tells me about his or her itching or pain in some specific body part, I sometimes begin to feel similar feelings. I can think of about three explanations: I feel pain all over my ...
7
votes
1answer
20k views

What's a mouth ulcer/canker sore “made of”, and why do they develop?

Mouth ulcers are red/white rings with a crater. They are sore and last for 7-10 days. What I want to know is what they are 'made of' - i.e., what is the ring filled with, and why is the centre crater ...
3
votes
1answer
220 views

Why pain caused by blunt objects vanish after some time and return at the event of touching?

Background When any bone/muscle of body is hit badly by a blunt object, it hurts pretty bad of course for some time. But, after some time the pain goes off completely or to some extent. Then, if we ...
0
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1answer
878 views

What part of the body holds the most pain receptors?

What part of the body holds the most pain receptors or is likely to cause someone to feel the most intense pain? I thought it was the eyes but I can't find that source anymore.
1
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1answer
41 views

Results of self-administration study about pain in honeybees?

There research on nih.gov about ability of bees feel pain. But I can't understand their conclusion. Could you provide necessary excerpts here from those study so it would be clear what conclusion they'...
4
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1answer
1k views

What causes the pain when a bone fracture is healing?

Why does a fracture still hurts when it is healing? I understand the pain at the beginning - the bone is not in its place, there is a pressure against the nerves, also the swelling pushes the nerves ...
20
votes
1answer
17k views

Is it painful for the hen to lay eggs?

My little son just asked me this question. His mother used to complain about the excruciating pain she suffered when she gave birth to him. He is a compassionate kid and wonders whether the hen goes ...
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0answers
51 views

Pain and Angina Pectoris

What causes pain in an angina pectoris? Ok, heart muscles may lack oxygen, but what is the role of pain here? Is it being beneficial? I'd like to know the physiological process of induction of pain ...
7
votes
1answer
476 views

What stimulates a nociceptor?

For instance, when pressure is applied to the skin, what determines how much pressure results in nociceptor stimulation. And when a sharp object pierces the skin, why is pain, rather than simply touch,...
1
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1answer
131 views

Is it the theory of the 5 senses obsolete? [closed]

An enigmatic topic in traditional science was labelled as the mystery of the 5 senses, and how to best group senses by type. Is that theory now meaningless? Do Scientists still agree that that ...
5
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3answers
5k views

Do lobsters possess a nervous system to feel pain?

I was reading an article, which it mentions that lobsters do not have a nervous system: Lobsters have very poor eyesight and no nervous system. They walk slowly on the sea floor but are capable ...
2
votes
2answers
105 views

At what stage is the nervous system developed enough to interpret neuronal signals as 'pain'?

According to this article in Live Science, one of the reasons the fetus can't feel pain until 19 weeks is because the nervous system isn't fully developed. But according to this article, the heart ...
1
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0answers
41 views

Where does the pain from headaches come from [duplicate]

I may be wrong but I have always thought that the brain doesnt have any nerve endings, so why is it we get headaches and where does this pain come from? I have heard lack of sleep, hydration or ...
1
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1answer
92 views

What makes a rotator cuff tear symptomatic in humans?

The majority of rotator cuff tears is asymptomatic {1}. What makes a rotator cuff tear symptomatic or asymptomatic in humans? References: {1} Minagawa, Hiroshi, Nobuyuki Yamamoto, Hidekazu Abe, ...
3
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1answer
147 views

Why is burn feeling 'slower' than touch?

When you touch a hot object you first feel the touch and only after a second you feel the burn too, and if you detach your skin from the object the burn feeling continues for few seconds. I remember i'...
4
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2answers
1k views

How is information sent from the skin to the brain?

Say you have a needle, and you poke a very specific area on your left thumb. A signal gets sent from that nerve up your spine and into your brain. How does the brain know exactly where this signal ...
1
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0answers
234 views

Why are interneurons needed in the spinal cord for polysynaptic reflexes and somatosensory tracts to the brain?

The single explanation I found for the polysynaptic reflex is that the interneuron diverges into more pathways, such as the efferent motor neuron, the inhibitory neuron to the opposite extensor muscle,...
3
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1answer
46k views

Why do we suffer abdominal pain after we get very angry or stress?

You also realize probably, when we get so much anger or high levels of stress, after some point we have terrible stomach ache, like really heavy pain. Why is that? How stress or anger can effect our ...
4
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0answers
377 views

Why does crippling pain exist? [closed]

Some kinds of trauma can cause pain so severe that it makes you unable to move or do anything at all. It may put you out of action and unable to help yourself because of how excruciating it is. ...
0
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0answers
124 views

Is there an evolutionary advantage associated with migraine? [duplicate]

I have read Wikipedia article on Genetics of migraine headaches and I don't buy it Because genetics influence susceptibility to migraine, it can be shaped by evolution. Fitness-impairing ...
18
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2answers
28k views

Can one die from pain?

Is it possible that a human or any other creature can die from pain? I googled and found different answers. Some articles say Yes while others say No.
3
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3answers
399 views

Swapping genes?

So, gene therapy is to take out a gene, correct its mutation, and put the corrected one back into the organism, right? Is it also possible to take out a gene from an organism and put in a totally ...
14
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4answers
4k views

Is it possible to feel pain in some part of a body, but the pain “feeling” is introduced somewhere else?

Is it possible to feel pain in some part of a body, but that the cause of the pain is situated elsewhere in the body? For example, somebody feels pain in his toe, but it turns out that this pain is ...
1
vote
0answers
75 views

Why is a wound much more painful when damp?

Why is a wound much more painful when damp? This is a very strange phenomenon. For example: I have a little wound, not painful at all. But, when it is just damp, it is much painful.
3
votes
1answer
1k views

How is pain induced by blunt and sharp objects?

Normally, when something touch you, you won't feel pain. With a great force "touching" you, you will feel pain. However, if something that is spiky makes contact with you, you will feel pain. So, how ...
2
votes
1answer
5k views

What is the distance between the sciatic nerve and the colon at the closest point?

Is it possible that a full colon impinges on the sciatic nerve? Is there anything that physically separates the sciatic nerve from the colon?
2
votes
1answer
104 views

Why does mud therapy work by some pain related diseases?

Apparently, some users here agree there is no ion exchange through the skin. Mud therapy has some therapeutic effect for pain related diseases. As an anecdotal example, I experienced pain relief by ...
5
votes
1answer
138 views

How does Tylenol relieve pain without making me drowsy?

So I have a crown that popped out and has been killing me, I've lived on a steady diet of Tylenol since it popped out. I've noticed that aside from killing most of the pain from the tooth, the tylenol ...
2
votes
1answer
1k views

Most painless method for killing insects

I'm planning on having a small farm of crickets or grasshoppers. I would like to cause them as little suffering as possible, so I'm wondering what is the most painless way to kill them? So far, the ...
1
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1answer
213 views

Can someone die from pain? [duplicate]

I'm a CNA and I just got home from a very long day at work. I just started this job and I got hurt at work last night which made me wonder can enough pain cause death (without suicide)? I think the ...
6
votes
1answer
547 views

Do people with congenital analgesia feel cold?

There are a few diseases that cause an insensitivity to pain. This question asks about the relationship between the cold and pain, which got me thinking: Is shivering a response driven by the ...
5
votes
1answer
404 views

Why isn't the upper limit of pain lower in humans?

From what I understand, pain is an useful mechanism that signals us that something is not quite right with our body (in particular, we're under attack). It's good - it alert us and tells us that we ...
4
votes
2answers
381 views

If one endures the same form pain over a long period of time, would the pain begin to lose intensity?

Metaphorically thinking, if one endured the pain of constant burning for decades, would the pain slowly lose its strength?