Health officials are urging Americans to take tick bites seriously as ticks become active earlier in many areas. Warmer temperatures can allow ticks to emerge sooner, increasing the risk for people spending time outdoors. The Northeast and Midwest are among the regions reporting significant activity, but other parts of the country are also seeing growing concerns.

Ticks can spread illnesses including Lyme disease and Rocky Mountain spotted fever. Early symptoms may include fever, fatigue, headaches, body aches, and rashes, although not everyone develops the classic bull’s-eye rash. Another condition drawing attention is alpha-gal syndrome, a potentially serious allergy to red meat and certain animal products that can develop after certain tick bites.

Experts recommend wearing long pants, using EPA-registered repellents such as DEET or picaridin, and checking your body carefully after being outdoors. Pay particular attention to areas behind the ears, under the arms, behind the knees, around the waist, and along the hairline. Pets should also be checked because they can carry ticks inside. If you find a tick attached, use fine-tipped tweezers to grasp it close to the skin and pull upward steadily.

The biggest warning is not to ignore unusual symptoms after a tick bite. A spreading rash, fever, severe headache, facial weakness, or swollen joints should prompt medical attention. Scientists are also watching how changing temperatures and environmental conditions affect tick populations and their geographic range. Whether you’re hiking, gardening, walking the dog, or simply enjoying your backyard, taking a few minutes to check for ticks could help prevent a serious illness.