Hi Ann, I made some corrections for you here. Let me know if you have any questions about it.
Is this correct? I need help translating the text.
I seldom get sick. In winter, the cold wind can give me a cough or runny nose, but no fever. Sometimes I get a headache after a working for hours at the computer. And after the boring lessons, I feel tired, depressed and weak. I rarely get a toothache or stomach ache. When the weather changes dramatically, I do get a headache. I do not smoke and therefore I have no need stop smoking. I don't watch TV at all, but I spend a lot of time at the computer. I do not eat fast food, but I prefer something that I prepare myself. In the summer, I almost do not sunbathe. I love chocolate, as well as other sweets, and so I try not to eat too much, so as not to harm the body shape and health.