If you have been experiencing a blocked ear for a month after having sinusitis, it is recommended to try nasal hygiene techniques such as Sinus Rinse or Hydrasense to help reduce congestion and improve healing. If your symptoms persist for close to a month and are affecting your daily functioning, it may be wise to consult a doctor for evaluation and determine if antibiotics are necessary. Additionally, over-the-counter decongestants like pseudoephedrine may be helpful in relieving sinus congestion, but it is important to consult with a pharmacist to ensure it is safe for you based on your medical history and any other medications you may be taking. It is also important to be cautious of potential side effects such as agitation, palpitations, and insomnia, which are usually temporary.