Foot pain that is severe and follows an injury should be evaluated by a doctor, according to Mayo Clinic. Severe swelling, open wounds or a wound with pus, and signs of infection such as redness, warmth in the affected area and fever also warrant an immediate trip to the doctor.
Being unable to put weight on the foot, and having diabetes as well as a wound that doesn't heal should also be evaluated immediately, recommends Mayo Clinic. Conditions such as swelling that doesn't improve after two to five days of home treatment and pain that doesn't get better after several weeks merit a non-emergency trip to the doctor, as does burning pain, tingling or numbness on most of the bottom of the foot.
Pain that interferes with regular activities or worsens when the foot is moved and eases when at rest, or is severe enough to necessitate walking in an unusual way to avoid pain should be evaluated by a doctor, according to Foot Vitals, as well as changes in appearance, such as a foot that looks misshapen, or changes in skin or toenail color.
Trying to ease pain with rest, ice, compression and elevation may help ease some foot conditions, according to Foot Vitals, but trying to treat foot problems at home may cause more problems, states Cleveland Clinic.