Wudhu

Q: Is it mentioned that when we are doing wudu and washing our arms and legs, it should be done in order (i.e. washing hands first till wrist when washing the arm)

Q:

1. I have cavities in my tooth, and when I eat, food gets stuck. When I rinse my mouth or use miswak, it's still stuck. But when I brush my teeth, it easily comes out. Should I brush my teeth before I perform wudhu everytime I eat, or is it okay for the food to be stuck in the cavities?

2. Is it permissible to have dental fillings so that food doesn't get stuck, or is the filling regarded the same as stuck food? If it is permissible, is there any specific type which should be used as a filling? For example, the fillings come in gold, porcelain, a composite resin (tooth-colored fillings), and an amalgam (an alloy of mercury, silver, copper, tin and sometimes zinc).

3. Sometimes, the food eaten comes back to mouth unintentionally. When this happens, does wudhu break? What about fast?

Q: If a boil busts somewhere on your body and you only find out after the blood has dried on your clothing. If there is little blood, then do you consider that the the blood would not have flown out of the the wound and that you still have wudhu?

Q: I read that wudhu breaks when fluid comes out of the eye due to eye pain. Is this correct?

Will allerges and itchy/dry eyes fall under this?

Q: Sometimes dry skin of hands (specially near fingers) gets scratched and a little bit of blood appears - which is not more than a dana of rai (رائی دانہ). Does this nullify wuzu?

Q: Is it permissible to use hair concealer to cover bald patches? Can we make wudhu after applying hair concealer?

Note: Hair concealer is a powder which after applying to the hair, covers the bald patch.

Q: Is it necessary to perform wudhu after smoking a cigarette or wudhu will not break?

Q: I want to ask a question about cosmetic ingredients mica and stearate acid which is used in face powders and blusher is it halal to use it? I read that mica is a kind of silicate or silicone which sticks to your hair and will not come out. It is not recommended because you cannot do wudhu. 

Q:

1. I have persistent acne on my scalp and pimples often pop and pus/blood comes out. If a pimple pops then scabs, are these scabs impure?

2. If I wash my head when it has many scabs on it does the water become impure? If one of these scabs falls off, do I have to purify the area?

3. I also have a persistent toe infection that also drains pus/blood on and off at random times. For nearly all my fardh prayers, the infection spot is bleeding/draining pus. My question is, if my toe is bleeding/draining pus and it's time for prayer, how to I wash the area? I mean if I wash it normally, then the water that runs over it (which will no doubt run over the rest of my toe as well) will be impure, making my entire toe impure. How should I deal with this? In fact, how should one deal with washing bleeding limbs for wudu in general? If one runs water over it, the water becomes impure and everywhere else the water touches becomes impure. Is this impurity disregarded during prayer?

Q: For the reason of taking medication through drip, I have a covering on my arm just below the elbow. This is a plastic tap held by gauze and cannot be removed for at least two days. Is wiping with a wet hand on top of the gauze when performing wudhu correct?