Techniques for leveraging data collected by wearable devices and additional devices

A system, comprising:

• a wearable device configured to measure photoplethysmogram (PPG) data from a user using one or more light-emitting components and one or more light-receiving components;
• a user device communicatively coupled with the wearable device;
• and
• one or more processors communicatively coupled with the wearable device and the user device, the one or more processors configured to:
• receive baseline PPG data measured from the user by the wearable device during a first time interval, the baseline PPG data associated with a respiratory rate of the user throughout the first time interval;
• receive environmental data associated with one or more allergens present in a first geographical location of the user during the first time interval;
• identify one or more relationships between the respiratory rate of the user and the one or more allergens based at least in part on the baseline PPG data and the environmental data;
• receive additional environmental data associated with the one or more allergens present in a second geographical location of the user during a second time interval that is subsequent to the first time interval;
• and
• transmit an instruction configured to cause the wearable device, the user device, or both, to display an alert associated with the one or more allergens based at least in part on the one or more relationships and the additional environmental data.