The symptoms of monkeypox are similar to but less severe than those of monkeypox virus. They usually appear a week or two after exposure to the virus, although in some cases it may take longer. Monkeypox usually starts with flu-like symptoms, such as fever, chills, headache, and muscle pain. In humans, the symptoms of monkeypox are similar to but milder than the symptoms of monkeypox.
Monkeypox begins with fever, headache, muscle aches and exhaustion. The main difference between the symptoms of smallpox and monkeypox is that monkeypox causes lymph nodes to swell (lymphadenopathy), while smallpox does not. The incubation period (time from infection to symptoms) for monkeypox is usually 7 to 14 days, but can range from 5 to 21 days. The illness usually starts with flu-like symptoms, such as fever, headache, muscle aches, and exhaustion, which may last a day or two.
A rash often appears one to three days after the fever, which progresses from red areas to small bumps on the skin. These can become blisters that can be filled with whitish liquid. Early symptoms of monkeypox include fever, headaches, muscle aches, swelling, and back pain. Most patients experience only fever, body aches, chills, and fatigue.
People with a more serious illness may develop a rash and lesions on the face and hands that may spread to other parts of the body.