What are some allergic reactions from natural rubber latex?

Many-some dangerous. Latex allergy may cause allergic reactions ranging from sneezing or a runny nose to a rash, to throat swelling, to anaphylaxis, a potentially life-threatening condition. Your doctor may determine if you have a latex allergy or if you're at risk of developing a latex allergy.
Skin and respiratory. The most common adverse reaction to latex is a skin irritation that happens soon after contact with latex and resembles a rash. You can also get a more serious allergic reaction that occurs after about 24hrs with more redness and swelling. The most dangerous reaction is antibody mediated and can cause severe swelling, redness, and possibly difficulty breathing as latex particles can be inhaled.