How long does a rash on forehead last?

The duration of a rash on the forehead can vary depending on the underlying cause. Some common causes of rashes on the forehead and their typical durations include:

1. Acne: Acne-related rashes can last for several weeks to months. They may appear as small, red bumps or whiteheads on the forehead and can take time to clear up completely.

2. Eczema (Atopic Dermatitis): Eczema rashes can be persistent and may last for weeks to months. They often appear as dry, itchy, and inflamed patches of skin on the forehead.

3. Allergic Reactions: Allergic rashes, such as those caused by contact with allergens (e.g., certain cosmetics, skincare products, or plants), typically develop within minutes to hours of exposure and can last for several days.

4. Shingles (Herpes Zoster): Shingles rashes usually appear as a band or cluster of small, painful blisters on one side of the forehead. The rash typically lasts for 2-4 weeks before gradually resolving.

5. Viral Infections (e.g., Chickenpox, Measles): Viral infections that cause rashes, such as chickenpox or measles, typically have an incubation period before the rash appears. The rash then lasts for several days to a week before fading away.

6. Impetigo: Impetigo is a bacterial skin infection that causes red, crusty sores on the forehead. It typically lasts for 2-3 weeks with proper treatment.

7. Contact Dermatitis: Contact dermatitis, caused by direct skin contact with an irritant or allergen, can develop within minutes to hours and usually resolves within a few days to weeks once the irritant is removed.

If you have a rash on your forehead and are concerned about its duration or severity, it's essential to consult a healthcare professional for an accurate diagnosis and appropriate treatment. They can assess the rash, determine the underlying cause, and provide specific advice on how long it may take for the rash to clear up.