Saying that you feel sick. Словарь

It would be wonderful if we always felt that we could do anything, if we always had lots of energy and drive and didn't know anything about headaches. 

However, that’s not always the case, and sometimes we need to say that we don’t feel well.

These phrases can help you with that: 

• I’m sick. = I feel sick. – Мне плохо 
• I feel nauseous [ˈnɔːsɪəs] – меня тошнит 
• I'm going to throw up – меня сейчас стошнит 
• I think I have a fever – Мне кажется, у меня температура 
• I get carsick – меня укачивает в машине. 
• My stomach is upset. – У меня расстройство желудка. 
• Bless you! – Будь здоров (we say this when someone sneezes) 
• I’ve got a sore throat. – У меня болит горло. 
• I've got a cold. – Я простудился. 
• I have a rash. – У меня раздражение. 
• I'm allergic to.. – У меня аллергия на… 
• I’ve got the flu – у меня грипп 
• I've sprained my ankle! – я вывихнула лодыжку 
• I have a stomachache/backache/toothache/earache – у меня болит живот, спина, зуб, ухо 
• I have a migraine. – У меня мигрень. 
• I feel awful. – Я ужасно себя чувствую. 
• My leg/head/finger/back hurts – у меня болит…. 
• To be in severe pain – чувствовать острую боль 
• I've got a runny nose. – У меня течет из носа. 
• I feel dizzy. – У меня кружится голова. 
• My foot is swollen. – У меня опухла ступня. 
• I have a food poisoning – я отравился.

And here are some idioms with the word “sick”:

• To be sick as a dog – to be very sick
• To be sick and tired of something – to be fed up with something (надоело) 
• To be sick at heart – to be depressed 
• To call in sick – to call your workplace and say that you’re sick and you won’t come that day 
• To sick up – to empty one’s stomach, to throw up 
• To be sick in bed – to be sick and to stay in bed 
•  To be down with – to be sick with an illness (He’s down with the flu) 
• Sick leave – the period of time when a person doesn’t work because he/she is sick – больничный 
• To be taken ill – заболеть 
• To be worried sick – to be very worried 
•  Something makes (me) sick – to cause you to feel disgusted 
• You’ll catch your death of cold! – Ты простудишься до смерти!

Watch this video to find out how people react when their friends get sick!