Strange Weakening Feeling

Why do we feel weak after donating blood?

Its more of a feeling of "lightness" than weakness. It is caused by the lowered blood sugar to the brain. Your blood sugar has lowered because the amount of blood taken also had a certain amount of blood sugar. Since it is suddenly missing, the body reacts poorly to this loss of sugar.  The symptoms include onset of nausea, headaches, shakiness, paresthesia, hunger, fatigue...and so on. However, to quickly deal with hypoglycemia directly after a substantial loss of blood, sit with your head to your knees (parallel to the floor), as this lowers your brain and facilitates the blood-flow to the brain, allowing more blood sugars to reach it quickly. However, having carbohydrate-rich foods cure this.  It will help normalize the sudden change in blood sugar and will help you feel more normal sooner. The "Weakness" you feel is due to the sudden loss of blood pressure due to the blood loss but the body compensates this loss by retaining fluid in the kidneys by concentrating the urine.

Does scaling and polishing make teeth weak?

It is a wrong perception that scaling makes your teeth weak or it removes a layer of your teeth.Scaling is the treatment for periodontitis, it is a prophylactic treatment. It does not removes the tooth layer but the plaque and calculus from your tooth.During scaling, there may be mild bleeding, it is not due to any harm to your oral health but due to the infection in your gums and bones.You may have slight sensitivity after the scaling procedure, it is because earlier you were carrying chunks of calculus over your teeth and after it is removed your teeth is exposed to the oral fluids again. Like you feel sensitive to the area when a bandage has been removed after a long period.If you had grade 3 periodontitis, after scaling you may feel slight mobility in your tooth. It is because, earlier the calculus was eating your bone and instead of the eaten bone, calculus(dirt) was holding your tooth. Now once that calculus is removed, you may feel mobility of tooth, but it will heal now. If you do not remove that calculus, it may eat the complete layer holding the tooth and the tooth will shed off automatically. Apart from that, calculus will also spread to the other teeth.All these symptoms will gradually go off within 7-15 days of the treatment.Be patient and relaxed if you are in the hands of a doctor.

Why do guys feel weak after sex?

After you have sex, your brain secretes prolactin, which is what causes you to become drowsy, and is also responsible for the refractory period after sex. The refractory period is the time it takes for a man to have an erection again after ejaculation. For some it’s a few hours, for others it can be a day.A measure of how much you enjoyed the sex that you just had is from how much prolactin your body releases. When you have sex that isn’t very satisfying, your brain secretes less prolaction. When it’s the best sex ever, you’re also more drowsy and weak afterwards.This, along with the physical activity that sex involves, is what makes you feel so weak after sex.Men and women both produce prolactin, but it has a slightly different effect on men vs women. Women are naturally a bit more immune to prolactin’s effects as their body is genetically programmed for it. It is the hormone that causes women’s breasts to produce milk. So while both sexes become weak after sex, prolactin has a stronger effect on men.Something else that increases prolactin levels is steam inhalation. Which is why most people feel relaxed after a shower. It is common for men to experience softer erections immediately after a shower, and a hard time maintaining one as well. A shower pretty much mirrors the refractory period that follows after sex.The longer your shower is, the more “like sex” it will feel.

Why do I feel sick and weak after I drink coffee?

You should ask yourself how often you drink it. If you drink it every now and then, what’s happening is that you’re likely experiencing some intense sympathetic nervous system arousal, and then you’re crashing afterwards. Without knowing the time course of this I really can’t say. I don’t feel sick and weak after i drink coffee but sometimes after a couple hours of working I feel more tired and drained.

Why do I feel weak and shaky when I'm hungry, but my sugar isn't low when I check it?

I don't know - I often experience the same thing (need to eat now so a little shaky).I've also checked my blood sugar when very hungry - within normal range.  Used to think I was experiencing medical hypoglycaemia - but nope.  Normal hunger.Probably two things going on:1) my blood sugar is probably lower than my body likes, even though in normal range2) my body is signalling to me to eat Our bodies also switch between energy sources, so if we don't have sugars being absorbed from food in our gut into our blood, it needs to switch to other sources.  The switch might be slow, so we may feel low in energy.  Or, we aren't used to burning that fuel source, so we feel weak and shaky. I used to think it was very bad to let myself get weak and shaky from hunger, and still do eat as often I need to eat to feel comfortable.  And I eat the things my body likes - carbs are a close friend of mine!  However, I've decided that while the weak and shaky can get in the way of work I want to do (particularly thinking work) it's not doing any damage to my body, and is just a signal from my body saying: I'm low in sugar and should eat.  Sounds like your body deals with hunger in a similar way to mine: I say, eat what feels good to your body (in moderation), and don't do any unusual highly intense exercise when very very hungry!