My legs are red and itchy when the weather is hot.

From the description, it is eczema or urticaria. Very common skin disease. Don't worry and be afraid.

I suggest you see a doctor immediately. There are ointments like 999 dermatitis flat in the drugstore, which can relieve the pain. But they all contain hormones. Long-term use is not good for your health.

Simple hormone therapy should also be avoided when seeking medical treatment. This can communicate with doctors. If you take hormone drugs, you will gain weight quickly.

You will get better in two or three days after seeing a doctor. But pay attention to your diet. Avoid the stimulation of spicy food. Because you're allergic. Pay more attention to yourself.

Please treat as soon as possible. Over time, the skin will become sensitive, the skin's own resistance will be weakened, and it will be more allergic.

In short, getting sick is a minor problem. It's painful, but don't be afraid. Timely treatment, nothing happened.

I wish you the best of health!